Re: [music-dsp] IIR Coefficient Switching Glitches

2013-11-03 Thread Rob Belcham
I second that. Make sure you're trying to ramp to the target coefficients over a sensible period of at least a few milliseconds and update the coefficients every sample if you can afford the cycles. Also, if the filter types are very different, you might want to think about ramping to a bypass

Re: [music-dsp] My latest computer DSP signal pathfor audioimprovements

2013-05-02 Thread Rob Belcham
ic.columbia.edu] On Behalf Of Theo Verelst Sent: 01 May 2013 17:57 To: A discussion list for music-related DSP Subject: Re: [music-dsp] My latest computer DSP signal path for audioimprovements Rob Belcham wrote: Hi Theo, Some wet / dry example audio would be interesting to hear. Cheers Ro

Re: [music-dsp] My latest computer DSP signal path for audioimprovements

2013-04-30 Thread Rob Belcham
Hi Theo, Some wet / dry example audio would be interesting to hear. Cheers Rob -Original Message- From: Theo Verelst Sent: Monday, April 29, 2013 9:57 PM To: music-dsp@music.columbia.edu Subject: [music-dsp] My latest computer DSP signal path for audioimprovements Hi all, As some

Re: [music-dsp] Noise gate for guitar amplifiers and hysteresis

2012-07-04 Thread Rob Belcham
Hi Ivan, Another flavour of skew would be to add an additional attack & release envelope between the target gain calculation (G1 or G2) and VCA. This would typically be the envelope controls that you provide to the user, while the RMS detector envelope parameters are usually fixed. As the gate

Re: [music-dsp] recommendation for VST host for dev. modifications

2012-06-26 Thread Rob Belcham
JUCE has quite a good vst host. I use it a lot for testing VST plugins. Cheers Rob -- From: "Roberta" Sent: Monday, June 25, 2012 4:40 AM To: Subject: [music-dsp] recommendation for VST host for dev. modifications Hi, I'm wondering if anyone h

Re: [music-dsp] WDF Gyrator in BlockCompiler anyone ?

2012-05-02 Thread Rob Belcham
That's a shame. Thanks for letting me know. It must have been working at some point for the authors of the papers which mention it to get the results they did, but perhaps they had customized, or stable versions? I guess probably the best approach for me to take is to code the WDF model by

[music-dsp] WDF Gyrator in BlockCompiler anyone ?

2012-05-02 Thread Rob Belcham
Hi List, Does anyone have any experience with Wave Digital Filters, particularly using BlockCompiler from www.acoustics.hut.fi ?  I'm working through the example transformer model in the paper "Real-Time Audio Tranformer Emulation for Virtual Tube Amplifiers" but I'm stuck with an aspect of the

Re: [music-dsp] Vectorising IIR Filters

2011-10-11 Thread Rob Belcham
Can you live with some latency ? If so, a simple approach I've taken on the Sharc DSP is to split the chain in half & process one half on each core, e.g PEx = Band 1 -> Band 2 PEy = Band 3 -> Band 4 so the input to band 3 will always be one sample behind. This approach doesn't scale up

Re: [music-dsp] Sinewave generation - strange spectrum

2011-04-26 Thread Rob Belcham
If it's possible to record the time-domain audio output & plot it, that might help in trying to figure out where the problem is. Is the audio clipping perhaps, what is the amplitude set to ? Have you tried copying the input buffer directly to the output buffer so you can rule out everything ex

Re: [music-dsp] .rsr for pro tools

2011-02-27 Thread Rob Belcham
Have a look at JUCE, I believe that can generate VST / AU & Pro Tools plugins (.rsr?) all from the same codebase. http://www.rawmaterialsoftware.com/juce.php Regards Rob -Original Message- From: Michael Olsen Sent: Sunday, February 27, 2011 6:34 AM To: A discussion list for music-re