User guide

USING CLOCKWORKS FOR MAC OS X WITH THE MIDI TIMEPIECE AV 15
Sending pedal data
Once you have made the pedal data assignment and output
assignment as described in the previous sections in this chapter,
no other preparation is necessary. Just move the pedal.
Saving knob settings as part of a base setup
For information about how to save knob and pedal settings as
part of one of the eight MIDI Timepiece AV base setups, see
“Ad d i n g c o m m a n d s t o a setup or modifier” on page 130 in the
MOTU USB MIDI User’s Guide.
Saving the knob settings as a modifier
Yo u c a n s a v e o n e or more knob or pedal settings together as a
modifier. Doing so allows you to recall the settings instantly with
the Setups & Modifiers window, the Patch List window, the front
panel LCD, or a MIDI patch change without changing the rest of
the settings in the MIDI Timepiece AV. For information, see
“Ad d i n g c o m m a n d s t o a setup or modifier” on page 130 in the
MOTU USB MIDI User’s Guide.
Using an audio click as a tempo source
The MIDI Timepiece AV can convert an audio click into any
MIDI event. The audio click can be played back from a tape deck
or generated live by a drummer. This feature can be used for many
purposes. Below are a few ideas:
■ Recording the click’s tempo map into a sequencer
■ Slaving a sequencer to a click track
■ Trig ger i ng drum sampl e s
This feature can be used in conjunction with MOTU’s Digital
Performer software to slave a sequence to prerecorded music on
tape while referenced to SMPTE time code. For more
information, please refer to the Digital Performer User Guide.
To c onve r t an audio click into MIDI:
1 Be sure that the audio click source is connected to the PEDAL
A phone jack on the rear panel of the MIDI Timepiece AV.
2 Open the Knobs & Pedals window in ClockWorks.
3 Click Pedal A.
4 Under Pedal Type, select Click-to-MIDI.
The Click-to-MIDI options appear in the right-hand side of the
window.
Figure 24: Click-to-MIDI Assignments.
5 Set the Threshold and Decay.
The threshold can be set anywhere on a scale from 0 to 70. The
audio click must be loud enough to reach the threshold. A soft
click will require a low threshold. Tr y to set the threshold as high
as possible, however, to avoid false triggering from noise. Decay is
meant to prevent doubled attacks. The decay can be set from 1 to
31. Low values make the decay longer; high values make it shorter.
Tr y to set the decay as long (low) as possible, but if you are
working with a faster tempo, don’t make it too long or you will
miss beats. The decay also determines the duration of the MIDI
note generated by the MIDI Timepiece AV. A low decay produces
a long duration; a high decay produces a short duration. You may
need to experiment to adjust these values.
6 Choose the data type you wish, and set the data for the event.
7 Make the desired output assignment for the MIDI click data.
For more information, see “Making a pedal output assignment”
on page 14.
8 Check to make sure that the MIDI Timepiece AV is successfully
reading the click.
Click input hints
If the MIDI Timepiece AV reads the audio click erratically, such as
generating doubled attacks, try adjusting the threshold and decay
values. If you still have trouble, try attenuating the audio signal
from the click source or through a mixer. The PEDAL A input is
purposefully sensitive so that it can detect a low-amplitude signal.
If you are generating the click that the MIDI Timepiece AV will
convert, set the audio level fairly high (at around 0 dB). Also,
record a short, transient click sound with no reverb or other
effects. A short and precise click sound will produce the most
reliable results.
Sending sysex data with a knob
A knob can transmit a sysex message up to 27 bytes long. You
define a variable byte within the message. As you turn the knob, it
generates a continuous stream of sysex messages; each message is