Operation Manual
Tetra Operation Manual Version 1.3 September 2010 Dave Smith Instruments 1210 Cabrillo Hwy N Half Moon Bay, CA 94019-1449 USA ©2010 Dave Smith Instruments www.DaveSmithInstruments.
Tested To Comply With FCC Standards FOR OFFICE USE This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation. This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Contents Quick Start................................................................................................. 1 Getting Connected .................................................................................... 3 Front Panel Controls ................................................................................. 5 Basic Operation......................................................................................... 9 Global Parameters .........................................................
Support.................................................................................................... 45 MIDI Implementation ............................................................................... 47 MIDI Messages.................................................................................... 47 NRPN Messages ................................................................................. 50 Global Parameter Data........................................................................
Quick Start Thanks for purchasing your Tetra synthesizer! Listen to the sounds, twiddle some knobs, have some fun! Please Register! Please go to www.davesmithinstruments.com and register your synth. If you purchased directly from us, there is no need to register — we already have your contact information. Powering Up So, plug in the power supply, connect (in stereo!) to your mixer/sound system, and start playing! You can use the PUSH IT switch to trigger sounds without a keyboard.
decrement change the values. These settings are remembered when the synth is turned off. Summary You should be up and running now; for more operation information, read on. Or, just look up specific parameters for detailed notes. Pages 41 through 43 contain a handy reference for mod destinations and sources. At some point you should read through the manual to discover all the little features that you might not notice at first. Don’t forget you get a free editor for Mac OS or Windows with your purchase.
Getting Connected Tetra has several inputs and outputs on its back panel. Power Input — Connect the power supply included with your Tetra. The power supply comes with different AC adaptor prongs that allow it to work anywhere in the world. If for whatever reason you need to use a different supply, it must match the specifications printed on the front panel. Note: The power supply label says “Evolver” on it; we use the same supply for the mono Evolvers, Mophos, and the Prophets.
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Front Panel Controls Select — Use SELECT to change and scroll through programs and combos. When ASSIGN PARAMS is on, SELECT changes the value of the current parameter. Also used to select parameters in Global mode. Mode (Program/Combo/Global) — Tetra has four modes of operation: program, combo, global, and edit. Press the button to toggle between Program and Combo Mode. When in Program Mode, the display shows the name, number, and bank of the current program.
Write — Use WRITE to save an edited program or combo to any of Tetra’s memory locations. To execute the write operation, press the increment (+) button. To store a program or combo in a different location, press the WRITE button and change the destination using the SELECT knob before executing the write. Note: You can also change program banks by holding the increment (+) and decrement (-) buttons, but be careful! If you hit the increment button quickly, it saves the program wherever you are at that point.
Alternately, with ASSIGN PARAMETERS on, choose a parameter to edit with any of the ASSIGNABLE PARAMETERS controls, and change the parameter’s value using SELECT or the increment (+) or decrement (-) buttons. Edit B/Combo — This button behaves differently depending upon the current mode. In Program Mode, it switches between program layers. Each program has two layers, A and B. Each layer can be a complete, separate patch.
Basic Operation Tetra has multiple personalities. It is a four-voice, analog poly synth, a sort of “mini Prophet.” But the voice architecture is based on Mopho, so it has a couple of sonic tricks up its sleeve—specifically sub-octave generators and feedback— that are absent from the Prophet. Tetra is also a four-part, multitimbral synth with separate outputs, essentially four Mophos in one very compact box. And it’s a voice expander for other Tetras or for a Prophet ’08.
Combos When in Program Mode, press the Mode switch to enter Combo Mode. Combos are combinations of four programs, one for each voice. In Combo Mode, use SELECT and increment/decrement to change combos. Each of the ASSIGNABLE PARAMETERS knobs controls a parameter for its respective voice: knob 1 for voice 1, knob 2 for voice 2, and so on. And the bottom row of knobs affects all voices and programs in the combo. For more about combos, see Combos on page 33.
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Global Parameters Tetra’s Global parameters affect all programs globally. Examples include MIDI channel and fine tune. To edit the Global parameters, hold down the Mode switch (Program/Combo/Global) until the GLOBAL LED lights. The SELECT knob changes the global parameter and the increment and decrement buttons change the value. Transpose: -12…+12 — Master Transpose control, 0 is centered. Steps in semitones. Fine Tune: -50…+50 — Master Fine Tune control; 0 centered.
MIDI SysEx: Off, On — When On, the synth will respond to received MIDI SysEx messages, and will transmit them, when prompted, to the MIDI Out. See Sysex Messages on page 62 for details. MIDI Out Select: Out, Thru — MIDI Out can be switched to MIDI Thru to daisychain multiple MIDI devices. Poly Chain: Off, Out 1, Out 4, Out 8, Out 12, In End, InOut4, InOut8 — Using Poly Chain, up to four Tetras can be chained together for increased polyphony.
Note: Outputs 3 and 4 are noticeably louder than the other two outputs. This is normal. Outputs 3 and 4 are always monophonic and, therefore, do not require as much headroom as the mix outputs, which have to accommodate up to four voices at one time without distorting. The higher level provides optimum signal-to-noise ratio. Compensate for differences in level with a mixer.
Reset Globals — Tetra does not have a full hardware reset, but select this parameter and press WRITE to reset the global parameters to their factory defaults. MIDI SysEx Dump: see table — Allows dumping of programs and combos in SysEx format via MIDI.
Program Parameters All Program parameters can be edited using any of ASSIGNABLE PARAMETERS controls. To assign a parameter to a control, press the ASSIGN PARAMETERS button to light the LED, and then turn any of the knobs (1 through 4) to select a parameter. A full list of the parameters can be found on page 44. The selected parameter and value appear in the LCD display. The top line of the LCD displays the programmed value for reference; the bottom line displays the edited value.
Display Osc Off Waveshape No output Sawtooth Sawtooth Triangle Triangle Saw-Tri Sawtooth — Triangle mix Pulse xx Pulse Wave, with pulse width ranging from minimum (0) to maximum (99). The pulse width will turn off at the two extremes — this allows some interesting modulation possibilities. A square wave will be at Pulse 50. Glide: 0…127 — Sets the oscillator glide (portamento) rate. Glide can be set independently for each oscillator. Low values are faster.
accurate sounds, and allows precise de-tuning. The Oscillator Slop parameter allows subtle amounts of frequency drift. For larger amounts, use a random LFO or white noise mod. Pitch Wheel Range: 0…12 — Sets the bend range, in semitones, of the pitch wheel. The setting is the range in the positive or negative direction. For example, a setting of 7 lets you bend a note up or down by a fifth. Mixer Parameters Osc Mix: 0...127 — Enables the outputs of Oscillators 1 and 2 to be mixed in varying amounts.
Audio Mod: 0...127 — Controls the amount of audio from Oscillator 1 used to modulate the filter cutoff frequency. For filter-only audio, set OSCILLATOR MIX to 127, OSCILLATOR 2 SHAPE to Off, and OSCILLATOR 1 SHAPE to the desired waveshape. This is useful for bell-like FM sounds. A wide range of sounds can also be made using AUDIO MOD with the oscillators routed normally through the filter. Config: 2 Pole, 4 Pole — Selects either 2- or 4-pole operation for the filter.
Decay: 0…127 — Sets the Decay time. Sustain: 0…127 — Sets the Sustain level. Release: 0…127 — Sets the Release time. Pan Spread: 0…127 — There is a pan circuit after the VCA that pans the audio in the stereo field individually per voice. With a Pan Spread of 0, all four voices are panned dead center. As you turn up Pan Spread, each voice is gradually moved away from the center by different amounts. Every other voice goes in a different direction, left or right.
Display 3 Steps Timing Sync Sequence speed divided by 3 2 Steps Sequence speed divided by 2 1.5 Step 1 Step Sequence speed divided by 1.
Env Delay: 0…127 — Sets a delay between the time Envelope 3 is triggered and when the Attack portion actually begins. Env Attack: 0…127 — Sets the Attack time of Envelope 3. Env Decay: 0…127 — Sets the Decay time. Env Sustain: 0…127 — Sets the Sustain level. Env Release: 0…127 — Sets the Release time. Repeat: Off, On — When on, causes the delay, attack, decay, and sustain portions of Envelope 3 to loop for as long as the envelope is gated on.
Mod Wheel Destination — Selects the destination to which the mod wheel is routed. See Modulation Destinations on page 39 for a list of possible destinations. Press Amount: -127…+127 — Sets the maximum amount of modulation that can be applied from MIDI Channel Pressure (aftertouch). Press Destination — Selects the destination to which the Channel Pressure is routed. See Modulation Destinations on page 39 for a list of possible destinations.
Unison Assign: see table — Determines how Tetra responds to keyed notes when unison is on. Display Low Note LowRetrig HighNote HighRetrg LastNote LastRetrg Key mode Low note priority Low note priority, re-trigger envelopes High note priority High note priority, re-trigger envelopes Last note hit priority Last note hit priority, re-trigger envelopes Unison: On, Off — Turns unison on or off. When unison is on, Tetra behaves like a monophonic synth.
For Stack, both layers respond to MIDI notes for the entire key range, enabling two patches to be played simultaneously with a single key stroke. Voices 1 and 2 are assigned to layer A, 3 and 4 are assigned to layer B. Split assigns layer A from the lowest note to below the split point (see previous parameter) and layer B from the split point to the highest note. Note: In Combo Mode and Multi Mode, layer B is ignored. Clock Parameters The sequencer and arpeggiator share the BPM and CLOCK DIVIDE settings.
Mode: see table — Sets the order in which the arpeggiator plays notes. Mode Behavior Up Plays from lowest to highest note. Down Plays from highest to lowest note. Up Down Plays from lowest to highest and back to lowest. Assign Plays notes in the order keys were pressed. Random Randomly plays notes. Plays keyed notes and the same notes one octave higher, from lowest to highest. Plays keyed notes and the same notes one octave higher, from highest to lowest.
Display Key Step Trigger mode Striking a key advances the sequencer one step. On/Off: Off, On — Turns the sequencer on and off. Seq 1, 2, 3, or 4 Destinations — Sets the destination for each of the four sequence tracks. For a complete list, see Modulation Destinations on page 41. Seq 1, 2, 3, or 4 Steps: C0…D5+ or 0…125, Reset, Rest — Sets each step value for each of the four sequence tracks. The values are displayed as both relative note values and as simple numerical values.
For the most part, the sequence destinations are the same as the modulation destinations, which is appropriate: a sequence is just another modulation source. For each sequence step, the envelopes are gated on for half the step’s duration. The duration varies according to the BPM and Clock Divide settings (or the MIDI clock, if synced to an external source).
Sequences do not have to be the same length, however, which makes for some very interesting, less repetitive patterns, particularly when sequences are set to odd and even numbers of steps. S e q u e n c e Steps 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 Dest. 1 2 Dest. 2 3 Dest. 3 4 Dest. 4 v = step value; R = Reset Sequence one has an additional value, Rest, that appears in the list after Reset.
three routed to filter resonance, and sequence four routed to amplifier envelope amount for accents. Many of the factory programs have sequences programmed, so you can refer to those to see how certain effects are being achieved. To program a sequence: 1. Set the Sequencer On/Off parameter to On. 2. Play a note to start the sequence playing. To avoid having to hold a key down, set the Push It Mode to Toggle. Then use PUSH IT to start and stop the sequencer.
oscillator frequency to glide from the step three value when step four is gated on. The higher the Slew value, the slower the slew rate. And the slew rate can be different for each step. But its not just for oscillator glide. Slew can be applied to any of the destinations. For example, sequence three could be routed to filter cutoff with Slew in sequence four used to create a less abrupt transition from one step to the next.
Combos A combo is a collection of four programs—one per voice—combined to make a sort of super program. How a combo responds to MIDI note data depends largely upon whether or not it is monophonic (that is, unison is on) or polyphonic. The typical uses for a combo are: Stacked unison—All four voices play from a single key or the PUSH IT button with four different programs.
The top row shows the current combo, the program, the bank, and the voice being edited. The bottom row shows the program name. Note: Though the other combos and program banks can be used as a starting point for building new combos, the actual programs used are copies, so any edits made in Combo Mode do not affect the source programs. The converse is also true. Say a combo is created using the program “Arid” and then Arid is subsequently edited in Program Mode.
voices 2 through 4), the combo will play back polyphonically. If the PUSH IT button is to be used to latch notes on, Push It Mode must be set to Toggle in each of the voices. To start playback of four sequences simultaneously from the PUSH IT button, set Unison to On in voice 1, set the Push It Mode to Toggle for all four voices, and make sure Sequencer is set to On for all four voices. If the Audio Out parameter in the Global menu is set to Quad, each of the voices in a combo can be processed separately.
Using Poly Chain Poly Chain enables multiple Tetras to be chained together for increased polyphony, up to 16 voices. MIDI note data from a keyboard, sequencer, or other controller is intelligently processed so that, when one synth’s maximum polyphony is reached, additional notes are passed through the Poly Chain Out jack and routed to another synth. All that is required is a single MIDI cable for each of the chained synths and a mixer for combining the audio outputs.
Also, Mopho’s INPUT GAIN (similar to Tetra’s FEEDBACK GAIN) is not programmable, so it may take some tweaking to get feedback to sound the same on Mopho and Tetra, even if the same programs are loaded in both. Programs that don’t use feedback should sound the same.
Various Poly Chain Configurations Using Tetra, Mopho, and the Prophet ’08* *If Out 4 and Out 8 do not appear as poly chain options on the Prophet, contact support@davesmithinstruments.com for information about updating the OS.
Using USB Tetra’s USB 2.0 port enables bidirectional MIDI communication with a computer. A MIDI interface and MIDI cables are not necessary, just a USB cable. Tetra is a Class Compliant USB device. That means it does not require any additional drivers to be installed to communicate with a Mac or Windows computer. Tetra transmits and receives MIDI data via USB, but does not transmit audio.
Windows Vista essentially behaves the same as XP, but the device name is DSI Tetra rather than USB Audio Device. In Windows, if you unplug the USB cable and plug it back in while a program has the Tetra port open, you may have to resync. That usually means going to the USB Audio Device (or DSI Tetra) Properties, as in the procedure above, and clicking OK.
Modulation Destinations Display Off Destination No destination selected Osc 1 Freq Oscillator 1 Frequency Osc 2 Freq Oscillator 2 Frequency OscAllFreq Oscillator 1 and 2 Frequency Osc Mix Oscillator Mix NoiseLevel Noise Level Osc1 PulsW Oscillator 1 Pulse Width Osc2 PulsW Oscillator 2 Pulse Width Osc All PW All Oscillators Pulse Width Low Pass Lowpass Filter Frequency Resonance Resonance Audio Mod Audio Mod Amount VCA Level VCA Amount Output Pan Stereo Pan Position LFO 1 Freq LF
Env3Releas Envelope 3 Release Rate EnvAll Rel All Envelope Release Rates Mod 1 Amt Modulator 1 Amount Mod 2 Amt Modulator 2 Amount Mod 3 Amt Modulator 3 Amount Mod 4 Amt Modulator 4 Amount Fback Vol Feedback Volume Sub Osc 1 Sub Oscillator 1 Level Sub Osc 2 Sub Oscillator 2 Level Fback Gain 42 Feedback Gain Seq1 Slew Sequencer 1 Slew Rate (Seq 2 Dest only) Seq2 Slew Sequencer 2 Slew Rate (Seq 4 Dest only)
Modulation Sources Display Off Source No source selected Sequence1 Sequence 1 Sequence2 Sequence 2 Sequence3 Sequence 3 Sequence4 Sequence 4 LFO 1 LFO 1 LFO 2 LFO 2 LFO 3 LFO 3 LFO 4 LFO 4 Filt Env1 Filter Envelope VCA Env 2 Amp (VCA) Envelope Envelope3 Envelope 3 PitchBend Pitch Bend Mod Wheel Mod Wheel Pressure Pressure (Aftertouch) MidBreath MIDI — Breath Controller Midi Foot MIDI — Foot Controller Midi Exp MIDI — Expression Velocity Keyboard Note Velocity KeyNumber
Parameter List Osc 1 Frequency Osc 1 Fine Freq Oscillator 1 Shape Oscillator 1 Glide Osc 1 Key Track Sub Osc 1 Level Osc 2 Frequency Osc 2 Fine Freq Oscillator 2 Shape Oscillator 2 Glide Osc 2 Key Track Sub Osc 2 Level Osc Hard Sync Glide Mode Oscillator Slop Pitch Wheel Range Oscillator Mix Noise Level Feedback Volume Feedback Gain Filter Cutoff Freq Filter Resonance Filter Keyboard Amt Filter Audio Mod Filter Config/Mode Filter Env Amount Filter Env Velocity Filter Env Delay Filter Env Attack Filter Env D
Support Troubleshooting Here are a few suggestions for resolving problems that may occur. The sequencer has stopped running. Make sure Clock in the Global menu is set to Internal. Some of the programs sound different. Check the Mod Wheel position. The Mod Wheel can do a lot more than just add vibrato. Also, some of the programs use the sequencer to shape the sound so make sure Clock in the Global menu is set to Internal. There is a ground hum in the audio output.
contacting Technical Support. It’s probably the first thing they’ll ask you to do. Warranty Repair Dave Smith Instruments warrants that Tetra will be free from defects in materials and/or workmanship for 1 year from the date of purchase. Please register your product online at www.davesmithinstruments.com to establish the date of purchase. (This is not a requirement for warranty service, but it will help expedite the process.) Please contact support@davesmithinstruments.
MIDI Implementation Tetra receives MIDI data according to the mode controls under GLOBAL. In addition, there is interaction between some of the program parameters that determine the overall response of Tetra to MIDI data. Note that the following applies to using both the MIDI jacks and USB. Following are the Global parameters that affect response to MIDI: MIDI Channel: ALL, 1…16 — Selects the MIDI channel to send and receive data, 1 to 16. All receives on any channel.
Received Channel Messages Status 1000 nnnn 1001 nnnn 1010 nnnn 1011 nnnn Second 0kkkkkkk 0kkkkkkk 0kkkkkkk 0vvvvvvv 1100 nnnn 0ppppppp 1101 nnnn 1110 nnnn 0vvvvvvv 0vvvvvvv Notes: 0kkkkkkk nnnn Third 0vvvvvvv 0vvvvvvv 0vvvvvvv 0vvvvvvv 0vvvvvvv Description Note Off. Velocity is ignored Note On.
Transmitted Controller Messages Status 1011 nnnn 1011 nnnn Second 0000 0111 0010 0000 Third 0vvvvvvv 0vvvvvvv Description Volume knob Bank Select — 0 to 2 See sections below for additional Continuous Controller (CC) and Nonregistered Parameter Number (NRPN) messages transmitted. Additional Continuous Controllers (CCs) Transmitted/Received The following table details how CCs are mapped onto Tetra’s controls.
NRPN Messages The Non-Registered Parameter Number (NRPN) MIDI messages are used to transmit and receive both global and program parameters. They are transmitted when MIDI Parameter Send is set to NRPN in Global, and received when MIDI Parameter Receive is set to either NRPN or All in Global. The messages are handled in standard MIDI format using the NRPN CC commands in running status byte format.
Received NRPN Messages Status Second Third Description 1011 nnnn 0110 0011 0vvvvvvv NRPN parameter number MSB CC 1011 nnnn 0110 0010 0vvvvvvv NRPN parameter number LSB CC 1011 nnnn 0000 0110 0vvvvvvv NRPN parameter value MSB CC 1011 nnnn 0010 0110 0vvvvvvv NRPN parameter value LSB CC 1011 nnnn 0110 0000 0xxxxxxx NRPN parameter value Increment 1011 nnnn 0110 0001 0xxxxxxx NRPN parameter value Decrement 1011 nnnn 0010 0101 0111111 RPN parameter number MSB CC - Reset NRPN parame
391 0-3 Parameter Receive†: 0 All 1 NRPN only 2 CC only 3 Off 394 0-1 MIDI Controller Send/Receive Off/On 395 0-1 MIDI Sysex Send/Receive Off/On 400 0-3 Audio Out: 0 Stereo 1 Mono 2 Quad 3 Q LR34 403 0 - 13 Balance Tweak*: 0 = -7, 7 = 0, and 13 = 7 404 0-2 Pot Mode: Relative, Passthru, Jump 406 0-1 MIDI Out Select*: 0 MIDI Out 1 MIDI Thru 407 0-1 Multi Mode Off/On 411 0-1 Select layer A (0) or B (1) 412 0-1 Select Program mode (0) or Combo mode (1) 413 0-4 Select voice 0 All
4 6 4 5 204 205 0-1 0 – 120 7 6 206 0 – 100 8 7 207 0-103 9 10 12 13 8 9 10 11 208 209 210 211 0 - 127 0-1 0-1 0-3 14 16 17 12 13 14 212 213 214 0-5 0 - 127 0 - 127 Oscillator 1 Keyboard Off/On Oscillator 2 Frequency, 0 – 120 in semitones (10 octave range) Oscillator 2 Fine Tune; 0 = -50 cents, 50 = 0 (centered), 100 = + 50 cents Oscillator 2 Shape 0 Oscillator Off 1 Sawtooth 2 Triangle 3 Sawtooth/triangle mix 4 – 103 Pulse Wave, Pulse width 0 – 99 Oscillator 2 Glide Oscillator 2 Keyboar
54 42 37 237 0 - 166 43 38 238 0-4 44 45 39 40 239 240 0 - 127 0 - 43 46 47 48 49 50 41 42 43 44 45 241 242 243 244 245 0-1 0 - 166 0-4 0 - 127 0 - 43 51 52 53 54 55 46 47 48 49 50 246 247 248 249 250 0-1 0 - 166 0-4 0 - 127 0 - 43 56 57 58 59 60 51 52 53 54 55 251 252 253 254 255 0-1 0 - 166 0-4 0 - 127 0 - 43 61 56 256 0-1 62 57 257 0 - 43 63 64 65 58 59 60 258 259 260 0 - 254 0 - 127 0 - 127 LFO 1 Frequency; 0 – 150 unsynced frequencies 151 Sequence speed divided by 3
66 67 68 69 61 62 63 64 261 262 263 264 0 - 127 0 - 127 0 - 127 0 - 127 Envelope 3 Attack Envelope 3 Decay Envelope 3 Sustain Envelope 3 Release 71 65 265 0 - 20 72 73 66 67 266 267 0 - 254 0 - 47 74 68 268 0 - 20 75 76 69 70 269 270 0 - 254 0 - 47 77 71 271 0 - 20 78 79 72 73 272 273 0 - 254 0 - 47 80 74 274 0 - 20 81 82 75 76 275 276 0 - 254 0 - 47 Mod 1 Source; See Modulation Source list below Mod 1 Amount; -127 to +127 Mod 1 Destination; See Modulation Destination li
56 101 102 91 92 291 292 30 - 250 0 - 12 15 105 93 94 293 294 0 - 12 0-4 94 95 295 0-5 93 96 296 0-4 103 97 297 0-3 70 95 98 99 298 299 0-1 0-1 BPM tempo Clock Divide: Half Note Quarter Note Eighth Note Eighth Note half swing Eighth Note full swing Eighth Note triplets Sixteenth Note Sixteenth Note half swing Sixteenth Note full swing Sixteenth Note triplets Thirty-second Notes Thirty-second Notes triplets Sixty-Fourth note triplets Pitch Bend Range Sequencer Trigger: 0 Normal 1 Nor
104 106 100 101 300 301 0-1 0-1 Arpeggiator; off/on Gated Sequencer; off/on 111 105 X 0 - 183 Assignable Parameter 1 112 106 X 0 - 183 Assignable Parameter 2 113 107 X 0 - 183 Assignable Parameter 3 114 108 X 0 - 183 Assignable Parameter 4 19 110 310 0 - 127 Feedback Gain 96 111 311 0 - 127 Push It Note: C0 to C10 97 112 312 0 - 127 Push It Velocity 98 113 313 0-1 5 114 314 0 - 127 Sub Oscillator 1 Level 11 115 315 0 - 127 Sub Oscillator 2 Level 18 116
The following tables list the values used with the program parameters to specify modulation destinations and sources.
Note: In Multi Mode, the regular, program NRPNs are received and transmitted for each of the four voices on their separate MIDI channels. Quad NRPNs come from/go to all four voices in a combo.
34 543 799 1055 1311 1567 35 36 37 38 39 VCA ENV VEL AMT VCA DEL VCA ATT VCA DEC VCA SUS VCA REL 544 545 546 547 548 800 801 802 803 804 1056 1057 1058 1059 1060 1312 1313 1314 1315 1316 1568 1569 1570 1571 1572 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 LFO 1 FREQ LFO 1 SHAPE LFO 1 AMT LFO 1 DEST LFO 1 SYNC LFO 2 FREQ LFO 2 SHAPE LFO 2 AMT LFO 2 DEST LFO 2 SYNC LFO 3 FREQ LFO 3 SHAPE LFO 3 AMT LFO 3 DEST LFO 3 SYNC LFO 4 FREQ LFO 4 SHAPE LFO 4 AMT LFO 4 DEST LFO 4 SYNC 549 5
77 78 79 80 81 82 MOD SOURCE 3 MOD AMT 3 MOD DEST 3 MOD SOURCE 4 MOD AMT 4 MOD DEST 4 583 584 585 586 587 588 839 840 841 842 843 844 1095 1096 1097 1098 1099 1100 1351 1352 1353 1354 1355 1356 1607 1608 1609 1610 1611 1612 107 108 109 110 SEQ 1 DEST SEQ 2 DEST SEQ 3 DEST SEQ 4 DEST 589 590 591 592 845 846 847 848 1101 1102 1103 1104 1357 1358 1359 1360 1613 1614 1615 1616 83 MOD WHEEL AMT MOD WHEEL DEST PRESSURE AMT PRESSURE DEST BREATH AMT BREATH DEST VELOCITY AMT VELOCITY DEST FOOT AMT FOO
114 PARAM ENC SEL V4 620 X X X X 19 622 878 1134 1390 1646 623 624 879 880 1135 1136 1391 1392 1647 1648 98 5 11 18 FEEDBACK GAIN PUSH IT NOTE PUSH IT VELOCITY PUSH IT MODE SUB OSC 1 VOL SUB OSC 2 VOL FEEDBACK VOL 625 626 627 628 881 882 883 884 1137 1138 1139 1140 1393 1394 1395 1396 1649 1650 1651 1652 117 EDITOR BYTE 629 120 SEQ 1 136 SEQ 2 632 – 647 648 – 663 888 – 903 904 – 919 1144 – 1159 1160 – 1175 1400 – 1415 1416 – 1431 1656 – 1671 1672 – 1687 152 SEQ 3 168
0vvv vvvv 0000 0110 0000 0010 0000 0001 0010 0110 0000 0001 0000 0000 0000 0000 0jjj nnnn 0000 0000 0000 0000 1111 0111 If MIDI Channel = ALL, 0vvvvvvv = 0111 1111. Otherwise 0vvvvvvv = Channel Number 0-15.
Request Global Parameter Dump Status Description 1111 0000 System Exclusive (SysEx) 0000 0001 DSI ID 0010 0110 Tetra ID 0000 1110 Request Global Parameter Transmit 1111 0111 End of Exclusive (EOX) Tetra will respond by sending out the current values of Global Parameters in the format described below in Global Parameters Data Dump.
Program Data Dump Status Description 1111 0000 System Exclusive (SysEx) 0000 0001 DSI ID 0010 0110 Tetra ID 0000 0010 Program Data 0000 00vv Bank Number, 0 - 3 0vvv vvvv Program Number, 0 - 127 0vvv vvvv 384 bytes expanded to 446 MIDI bytes in “packed MS bit” format (see page 66.
Combo Edit Buffer Data Dump Status Description 1111 0000 System Exclusive (SysEx) 0000 0001 DSI ID 0010 0110 Tetra ID 0011 0111 Edit Buffer Data 0vvv vvvv 1024 bytes expanded to 1177 MIDI bytes in “packed MS bit” format (see page 66.) 1111 0111 End of Exclusive (EOX) Global Parameters Data Dump Status Description 1111 0000 System Exclusive (SysEx) 0000 0001 DSI ID 0010 0110 Tetra ID 0000 1111 Main Parameter Data 0vvv vvvv 20 nibbles (LS then MS) for 10 Global parameters.
Mode Change: Combo Mode Status Description 1111 0000 System Exclusive (SysEx) 0000 0001 DSI ID 0010 0110 Tetra ID 0011 0001 Select Combo Mode 1111 0111 End of Exclusive (EOX) Packed Data Format Data is packed in 8 byte “packets”, with the MS bit stripped from 7 parameter bytes, and packed into an eighth byte, which is sent at the start of the 8 byte packet.
Hidden Functions Hold the ASSIGN PARAMETERS switch and hit the Mode switch to calibrate the low-pass filter and analog oscillator waveshapes. This should not be necessary for normal operation.
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