Some notes about the Poly Delay Matrix.
The "poly delay matrix" first appeared in Sinnah synth
as polyphonic 3D chorus and resonator effect.
With "resonator" I didn't mean it was playable
as a physical modeling tuned instrument, rather that each voice,
played by the main oscillator, could have its own tuned resonances or 3D
chorus effect. The delays did follow the note pitch but with
a smoothed glide that depended on the amount of modulation
given by the three random LFO in the matrix.
Since now it's used in the much more complex Sinmad,
[which also has it's own little physical modelling generator
(HIAT/Burst)], this "poly delay matrix" has shown its limits (and
bugs). Looks intuitive that you would want to
use the matrix as instrument on its own now.
Therefore I modified the algorithm to be also usable like that,
however still with some limitations. That's for 0.9.9 next update
some patience and it will come.
Here I share two examples, one based on a slightly modified patch by
SeBaer (Thanks!) and another patch of mine.
This a mono instrument, best for low range. Due to the use of "sat lim"
effect, the sound is quite distorted and the attack is boosted.
Since the matrix is deeply modulated the sound exhibits some chaotic
behavior [remember the random LFOs].
The "glide/smooth" parameter is fundamental to adjust the transition
This a poly instrument, where a little signal: noise + sub osc +
"pingBootle" burst, works as exciter (trigger) of the resonator
in matrix, which plays the note pitches.
- The exciter signal is bandpassed using the main filter.
- The output of the matrix is cured with the stereo EQ.
Even though the matrix modulation here is minimal, some saturation
in the feedback path still happens. However I like it like that.
A cleaner sound can be obtained tweaking gain and
filter on the trigger signal.