i'm trying to experiment and learn how [fiddle~] works, using it to control
You should probably use [sigmund~] instead. It's not working perfectly yet
but is the future.
One thing to keep in mind when trying to use pitch and envelope tracking
for synthesis control is that the automatic process (fiddle or any other)
will never get it 100% correct. So you'll have to develop strategies for
musically applying this incomplete analysis.
As for some technical solutions to event detection the work of Nick
Collins (mostly supercollieder and matlab I believe) has some good methods
www.informatics.sussex.ac.uk/users/nc81/researchml.php
I read the help i made experiments, but i still have doubts on some issues.
For example how the low and high thresholds work? The explanation was a bit
obscure to me. I guess that:
- the low threshold is the one at which raw pitch/amplitude output becomes
different than zero, showing the value of both.
- the high threshold is the one at which cooked output is changed, and a bang
is sent out from the bang outlet.
But i noticed that if the high threshold is less than the low one, i get a
never stopping sequence of bangs. Why? Is it an issue of fiddle~ ?
I would also like to understand better the use of vibrato and reattack, the
help was not clear to me.
Then, i tried to find a way to send a "release note" signal (so i can make
synth note emulate the duration of guitar note) to the envelope generator:
i'm using vline~ with two possible "in" messages, a ramp up banged by the
bang outlet of fiddle, and a ramp down banged when the raw amplitude output
becomes zero.
I think this will create problems when i will try to recognize polyponic
notes. But also for monophonic purposes, i still have some troubles:
if i take the pitch information from the cooked output, as soon as i get the
bang the envelope attacks, but there is a recognizable delay time for cooked
pitch output to change from old value to new, leading to a disturbing pitch
switching attack. Instead, if i use the raw pitch output, no problem with
attack, but if i set a too long release time, i can hear the pitch going to
zero before the sound has disappeared.
Is there a more elegant solution for this?
In the end, i would like the velocity of the synth note be proportional to
the level of incoming guitar note. My first idea is to snapshot the value of
raw amplitude output few milliseconds after the note-on bang. Is it a good
idea or, again is there a more elegant solution?
thanks,
athos
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