Specifications

converter 1.5

2000 - 2005 urr Sound Technologies Inc.
48
audio gate settings
audio parameters : audio gate settings : lowpass / main+bandpass / highpass
[ F3 – F5 – F5/F6/F7]
Depending on the audio conversion mode selected for a particular channel, one of two different sets of
parameters will be visible for that channel in the audio input settings menu.
trigger decay time
When using a smaller input buffer for audio, or if converting a low-frequency waveform, the system may
analyze the audio input quickly enough to generate a trigger pulse for each cycle of the input waveform.
To avoid this rapid re-triggering, a minimum time constant (in milliseconds) can be established within
which a subsequent re-analysis of the audio input will not be performed. This parameter can be ignored
if trigger mode conversion is not being performed for the particular channel. If a certain note length is
desired as a forced maximum tracking speed, the ‘bpm notelengths’ display ( [F12] or [shift]-[F12] ) in
combination with converter’s tap tempo feature can provide a rough idea of what value to use for this
parameter.
WHEN CHANNEL IS SET TO CONTINUOUS CONTROLLER CONVERSION MODE:
threshold
This parameter determines the gate cutoff level for the respective channel (left / right), for which the
audio signal’s amplitude must cross before being converted, and below which audio will not be
converted to midi information. As an example, this is useful for converting audio signals which have a
higher residual noise component than usual. Possible values are in the range of 0 – 127.
resting value
Typically, when the audio falls below the gate cutoff value (threshold) for a particular channel, that
channel’s conversion value equals 0. The resting value parameter allows the zero-audio level to be any
value from 0 – 127, useful for continuous controller applications where the controller should rest at a
midpoint of 63 (such as the pitch bend controller), or default to a max value at 127.
WHEN CHANNEL IS SET TO TRIGGER CONVERSION MODE:
trigger level
This parameter specifies what amplitude the audio must cross (above) before a trigger event will be
generated. Essentially the same as the threshold parameter in continuous controller conversion mode,
the range of possible values are between 0 and 127.
release level
This parameter specifies the amplitude level below which the audio must fall before a release event (ie.
note on velocity zero) will be generated. Possible values are between 0 and 127, however setting this
parameter to zero will result in a release event never being generated (the audio amplitude cannot fall
lower than zero!). This parameter is automatically set to 1 when the particular audio channel has been
set to perform audio to midi conversion in trigger mode.