Re: [music-dsp] PCM audio amplitudes represent pressure or displacement?

2017-10-01 Thread Richard Wentk
Most speaker/amp systems produce a high-pass filtered step response - i.e. an exponential decay curve - because there’s always at least one DC blocking capacitor between the DAC and the speaker. (Usually there are more.) DC-coupled systems exist, but they’re not common and they’re certainly not

Re: [music-dsp] entropy

2014-10-21 Thread Richard Wentk
It would probably sound like a noise gate, and perhaps not terribly exciting. On the next level up, frequency domain and/or variable filter adaptive noise cancellation is a specialised but well-understood subset of DSP lore. (Try any cell phone, VOIP service, or video chat system for a demo.) B

Re: [music-dsp] entropy

2014-10-12 Thread Richard Wentk
Yes, great. Now how many bits does a noisy channel need to flip before your scheme produces gibberish? Richard > On 12 Oct 2014, at 12:36, Peter S wrote: > > So, for more clarity, my algorithm would segment the following bit pattern > > 0001001011001101

Re: [music-dsp] entropy

2014-10-12 Thread Richard Wentk
None at all, because Shannon only makes sense if you define your symbols first, or define the explicit algorithm used to specify symbols. Relying on human pattern recognition skills to say 'oh look, here's a repeating bit pattern' says nothing useful about Shannon entropy. The whole point of

Re: [music-dsp] a weird but salient, LTI-relevant question

2014-05-08 Thread Richard Wentk
I'd recommend Intelligence by Jeff Hawkins for some thought-provoking insights into high-level perceptual processing in the brain. Richard > On 8 May 2014, at 06:59, Enr G wrote: > > My two cents as a person in the field: > > the human hearing system is kind of an LTI... only at very low leve

Re: [music-dsp] TR : Production Music Mood Annotation Survey 2013

2013-02-19 Thread Richard Wentk
I'd guess Stravinsky hadn't heard much Country & Western when he said that. Richard On 19 Feb 2013, at 17:46, Richard Dobson wrote: > Quite! > > Stravinsky: "music is powerless to express anything at all". > > Maybe it's funded by De Wolfe? > > > Richard Dobson > > > > On 19/02/2013 11:5