[music-dsp] testing different subject header
rbj at audioimagination.com
Mon Apr 9 18:20:24 EDT 2012
this is identical to a previous message (that would not get past my
SMTP) with this sentence added and the subject header changed..
On 4/9/12 5:25 PM, Julian Schmidt wrote:
> Am 09.04.2012 23:22, schrieb Olli Niemitalo:
>> On Mon, Apr 9, 2012 at 11:32 PM, Julian Schmidt
>> <julian_schmidt at chipmusik.de> wrote:
>>> I really think it is an aliasing problem.
>>> but not due to the wrong wavetable content, but due to a cheap audio
>>> with poor filters.
>>> even when i output a single 440hz sine i get harmonics starting at
>>> -48db up
>>> to nyquist and beyond.
>> Lemme guess your wavetable size is 256? That's the amount of
>> distortion that would be expected from using "no interpolation". If
>> that's what you have then the codec is not at fault.
> i use code similar to what RBJ has posted with linear interpolation
> (although with a tablesize of 256 at the moment).
>> dupswapdrop -- the music-dsp mailing list and website:
>> subscription info, FAQ, source code archive, list archive, book
>> reviews, dsp links
> dupswapdrop -- the music-dsp mailing list and website:
> subscription info, FAQ, source code archive, list archive, book
> reviews, dsp links
r b-j rbj at audioimagination.com
"Imagination is more important than knowledge."
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