Sorry for the double post here.
I tried my guitar tuner with renoise and every note using renoise's included chip instruments registerd as being perfectly in tune (including FM sine).
LGPT oscillator tuning test 1
I took the A440 test tone sample from http://onlinetonegenerator.com/...
I reduced it to a mono single cycle waveform.
I loaded it into LGPT.
Switched to oscillator mode (loop end was 64 / 100decimal).
Notes played in tune if root note was set at C2.
LGPT oscillator tuning test 2
basic waveform samples taken at A440 from audiocheck.net (440Hz, 1 sec, -3db, 8Khz).
Cut them down to single cycle waveforms using renoise, chopping at zero crossing to get exactly 1 cycle.
Loaded them into LGPT.
Changed to oscillator mode...(loop end was 12 / 18decimal), Root note was A...
every note played out of tune...
Changed to root note C...still out of tune (consistently by one semitone)..
After I changed the root note to Csharp every note played perfectly in tune.
LGPT normal loop mode + oscillator mode tuning test
Extracted the single cycle waveforms from renoises included chip instruments (triangle smooth, triangle complex, chip triangle, chip square, chip sine FM, chip sine, chip sawtooth, chip saw smooth)
They will be in tune in normal loop mode if root note is C3.
They will be in tune in oscillator mode if root note is C6.
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if LGPT expects A440, root note C in oscillator mode...the renoise single cycle chip samples should be more out of tune in normal loop mode as the root note was C and not A.
Also these waveforms were behaving really strange in terms of tuning:
basic waveforms at A440 from audiocheck.net (440Hz, 1 sec, -3db, 8Khz) loop end 12
(because they played absolutely perfectly in tune across all octaves and notes, but only if root note was Csharp)...WTF?
Last edited by Mister Sombrero (Jul 5, 2013 4:25 pm)