harmonics appear

[tjingboem]

3th, 5th, 7th harmonics appear when i play a clean sine sample at the rootkey (and others).

What i did:

1. generated a 3 second sine with Audacity. This looks totally clean in Baudline.
   
2. imported the sine into Samplv1 with settings that should not add harmonics.
   
3. played Samplev1 at its rootkey but get all those harmonics.
   
   This shows the 220 Hz sine as generated by Audacity, but also a 3 x 220Hz, 5 x 220Hz, 7 x 220Hz. They do have less amplitude, but are still very present.

I wonder if Samplv1 can be improved so that it reproduces the 220Hz sinewave without distortion?
However, if this is "normal" behavior for a sampler, could you please provide a small explanatiion?

The sine wave of 3 seconds is attached.
sine.wav.zip

[rncbc]

hi

most probably the root cause is having the "DYN Limiter" turned on, as
is by default.

also, some aliasing introduced due to the sample-rate conversion on load
if the sample-rate of the file (.wav) is of different than the running
processing one (as of jackd).

byee

[tjingboem]

most probably the root cause is having the "DYN Limiter" turned on, as is by default.

Partially true. i have made a video (attached) and have set a loop around the entire sample
Limit-2018-07-22_15.19.31.mp4.zip
;

1. Limiter = off, velocity = 64 (start of video) --> 3 harmonics
2. Limiter = on, velocity = 64 (at 28 seconds) --> 3 harmonics
3. Limiter = on, velocity = 127 (at 52 seconds) --> 5 harmonics
4. Limiter = off, velocity = 127 (at 116 seconds) --> 3 harmonics

So: Limiter does add extra distortion when amplitude is at full power. Normal behavior i would say.

also, some aliasing introduced due to the sample-rate conversion on load if the sample-rate of the file >(.wav) is of different than the running processing one (as of jackd).

The sine is generated using Audacity at 48kHz and is without distortion. I run Jack so my whole system runs at 48kHz. No conversion of the sample is needed...

I hope i don't bug you too much with this issue - don't shoot the messenger :)