DSP and Plugin Development • Re: Roland Alpha Juno-2 pwm sawtooth

I'd describe the effect of timbre change as "interference", and it's likely the result of the different divisors the oscillator chip gets with portamento on or off.

I don’t quite understand how different divisors can influence the timbre. Do you mean that the internal waveforms (SAW, PWM, SUB) somehow react differently to different dividers? Or are they still synchronized with each other? It sounds like several waveforms are out of phase. Or something like formant shift ))

In addition, if the CPU is producing the integration (linear) portamento effect, this may be impacting the clock rate at which it can output address/data to the oscillator chip and strobe the data latch pin. This could dramatically impact the performance of the oscillator or even every module in the synthesizer due to changes in timing on the CPU alone.

I mean the timbre in the area when the frequency after portamento has stabilized. The note frequency is exactly the same as without portamento. I don’t understand how different dividers can affect the timbre itself if the oscillator reproduces exactly the same frequency. But something about the sound is clearly different.

Statistics: Posted by TechnoManiac — Thu May 30, 2024 2:48 am

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