Internal Resolution

iPassenger · Posted: Tue Jan 27, 2009 4:53 am Post subject: Internal Resolution

What is the internal resolution (depth) of the G2 audio stream?

Is it 24 Bit like the ADCs/DACs or higher and then scaled at the ouput?

Tim Kleinert · Posted: Tue Jan 27, 2009 10:26 am Post subject:

24 bit throughout the whole system.

davep · Posted: Tue Jan 27, 2009 4:36 pm Post subject:

There is an exception - apparently, the delay modules are 16 bit, not 24. This is generally still fine when using them for delay based effects like flanging, chorus, or echo, where the delay signal is added in parallel to the original 24 bit signal, but some folks have commented that a 16 bit delay module compared to 24 bit has a noticable effect on the audio when you are using them for things like physical modeling, where the entire audio signal passes through the delay module and is reduced to 16 bit. Personally, I think they still work great even for PM patches, based on the patches I've heard.

Tim Kleinert · Posted: Tue Jan 27, 2009 4:56 pm Post subject:

Yeah, I forgot the 16 bit delays. Not a problem for most stuff.

I must say, however, that I do experience a definite degradation of audio within a delay with 100% feedback, over a longer period of time. But I don't know if this is related to the 16/24bit issue (back and forth conversion perhaps) or to bad interpolation of nonfractional delay times.

Regarding PM: In my experience, PM patches based on the comb filter or the string osc work quite well. If you roll together something with standard delay modules however, you get the delay readout bug artefacts into your waveguide loops. I don't know how Chet dealt with this, but I still have an elaborate reed model lying around that I never finished because it is severly compromised by this issue.

The delay modules are utter shite. Oh, did I say that already somewhere? Laughing

seraph · Posted: Wed Jan 28, 2009 1:01 am Post subject:

iPassenger · Posted: Wed Jan 28, 2009 2:14 am Post subject:

Cheers folks.

Re:Delays

I use them a lot as my music makes quite heavy use of delays (i like sounds that shimmer off into the distance) but I do find they sound a bit grungy compared to the delays in my Boss VF1 (which is 32bit algos and 24bit converters... i think)

Talking of Comb filters:

Hated it when i first got my Nord (probably using too much feedback) but i love it now, great for warping the spectral shape.

purusha · Joined: Mar 13, 2008 Posts: 131 Location: Ilkley

Interesting info on the delays.

I wasn't aware of that! I guess it's a memory usage issue?

I'll look into rigging delays as sends rather than inserts in future and see if it makes a difference.

Thanks!

Any other modules with similar strange quirks?

Tim Kleinert · Posted: Thu Jan 29, 2009 11:24 am Post subject:

varice · Posted: Sun Feb 01, 2009 2:35 am Post subject:

mosc · Posted: Wed Feb 04, 2009 9:09 am Post subject:

These problems with occational use of 16 bits is annoying to some, but most G2 users probably can forget about these. I've used the G2 to prototype algorithms that are very sensitive to bit accuracy and delay accuracy and I can get by, but when I need to patch up something very accurate, like an ambiophonic processor, I use SynthMaker.