Author Topic: Does a dedicated audio digital delay IC exist? (easing into DSP)  (Read 15318 times)

MoltenVoltage

Re: Does a dedicated audio digital delay IC exist? (easing into DSP)
« Reply #20 on: October 25, 2010, 01:46:00 PM »
thanks for the reply, frank

from what you say, it sounds like you can increase the fv-1 sample rate to 44.1K or higher, correct?

can you connect external ram to increase the delay time/sample rate?  if so, is it very difficult?

what type of accuracy/consistency can be expected when converting a voltage to a delay time?

how many bits is the resulting output resolution, 16 bit?, 12 bit?
MoltenVoltage.com for PedalSync audio control chips - make programmable and MIDI-controlled analog pedals!

octfrank

Re: Does a dedicated audio digital delay IC exist? (easing into DSP)
« Reply #21 on: October 25, 2010, 03:48:28 PM »
from what you say, it sounds like you can increase the fv-1 sample rate to 44.1K or higher, correct?

48K is the max so 44.1K would be fine

can you connect external ram to increase the delay time/sample rate?  if so, is it very difficult?

No, there is no way to add external delay memory.

what type of accuracy/consistency can be expected when converting a voltage to a delay time?

9-bit ADC on the POTs so value ranges from 0 to 0.998 (511/512). If more resolution is needed many people use 2 POT inputs, one for a coarse setting and one for fine.

how many bits is the resulting output resolution, 16 bit?, 12 bit?

For audio it is a 24-bit delta-sigma converters, delay ram is a 14-bit floating point format so a bit of truncation can happen for large values when written to delay ram.
Frank Thomson
Experimental Noize