<![CDATA[ChipMusic.org - Distortion when using volume command on low samples]]> 2016-01-28T01:27:23Z PunBB https://chipmusic.org/forums/topic/17600/distortion-when-using-volume-command-on-low-samples/ <![CDATA[Re: Distortion when using volume command on low samples]]> Its not a bug its a feature big_smile

]]> https://chipmusic.org/herr_prof 2016-01-28T01:27:23Z https://chipmusic.org/forums/post/238948/#p238948 <![CDATA[Re: Distortion when using volume command on low samples]]> Bummer.

]]> https://chipmusic.org/mk 2016-01-27T23:53:29Z https://chipmusic.org/forums/post/238942/#p238942 <![CDATA[Re: Distortion when using volume command on low samples]]> Marc Resibois wrote:

Ramps generate by command are not processed at every sample because that would kill the cpu. So it's actually "staircases" rather than ramps. Low tuned samples like 808 kicks or low sine are indeed not liking this too much. They are always good detectors for half-assed interpolation

]]> https://chipmusic.org/herr_prof 2016-01-27T16:15:47Z https://chipmusic.org/forums/post/238920/#p238920 <![CDATA[Re: Distortion when using volume command on low samples]]> How did you generate it?

]]> https://chipmusic.org/herr_prof 2016-01-27T14:55:51Z https://chipmusic.org/forums/post/238914/#p238914 <![CDATA[Re: Distortion when using volume command on low samples]]> Hmm, still get the noise.

https://www.dropbox.com/sh/5trj801kx3bw … ZiEBa?dl=1

]]> https://chipmusic.org/mk 2016-01-27T09:46:32Z https://chipmusic.org/forums/post/238906/#p238906 <![CDATA[Re: Distortion when using volume command on low samples]]> Interesting.

If I have a pure generated sin wav at 44100 from the start, it shouldn't happen?

]]> https://chipmusic.org/mk 2016-01-27T09:42:38Z https://chipmusic.org/forums/post/238905/#p238905 <![CDATA[Re: Distortion when using volume command on low samples]]> Right, what Im saying is that it sounds like aliasing from a bad down convert from a higher sample rate to cd quality. If you did a brick wall filter above the highest part of the kick frequency it would go away.

The fact that the sound goes away using a filter cut implies its noise in the sample itself, not a bug in piggy (although pig could probably handle aliasing noise better)

]]> https://chipmusic.org/herr_prof 2016-01-27T02:13:47Z https://chipmusic.org/forums/post/238896/#p238896 <![CDATA[Re: Distortion when using volume command on low samples]]> Samples processed outside of LGPT aren't a problem.. I can just put a vol ramp on the kick, but I'd like to be able to control it within the sequence. If it was something you could turn on or off.. that'd be cool.. but it's just an annoyance sad

]]> https://chipmusic.org/mk 2016-01-27T02:06:25Z https://chipmusic.org/forums/post/238894/#p238894 <![CDATA[Re: Distortion when using volume command on low samples]]> Were there converted from a higher quality format? It sounds to me like aliasing noise, if i slap a filter cut on it I can minimize the sound. You can try processing the sample yourself for 44.1 with dithering and see if that helps:

http://www.darkroommastering.com/blog/d … -explained

PS the noise sounds amazing when you crush it further.

]]> https://chipmusic.org/herr_prof 2016-01-26T17:30:07Z https://chipmusic.org/forums/post/238877/#p238877 <![CDATA[Re: Distortion when using volume command on low samples]]> https://www.dropbox.com/sh/jytn2utz8nqx … nVsha?dl=1

Here's a test file. Interesting that setting the volume low eg. VOLM 0001 does not cause it..

Values over 0B00 aren't so noticeable - it's very short slides eg. 0100 to 0800 which seem to cause it.

]]> https://chipmusic.org/mk 2016-01-26T10:02:28Z https://chipmusic.org/forums/post/238871/#p238871 <![CDATA[Re: Distortion when using volume command on low samples]]> It is set to "linear"

]]> https://chipmusic.org/mk 2016-01-26T09:56:32Z https://chipmusic.org/forums/post/238870/#p238870 <![CDATA[Re: Distortion when using volume command on low samples]]> Is interpolation on or off?

]]> https://chipmusic.org/herr_prof 2016-01-26T06:36:36Z https://chipmusic.org/forums/post/238867/#p238867 <![CDATA[Distortion when using volume command on low samples]]> I've been mucking around with piggy tracker a lot these days. One thing which really bothers me, is with lower-tuned samples, when using the volume command there's a noticeable distortion, or perhaps loss of resolution. I made a very simple test comparing piggy to a manually volume ramped (in ocenaudio) 808 kick.

https://soundcloud.com/metrodub/lgpt-distortion

This is on the OSX version.

]]> https://chipmusic.org/mk 2016-01-26T05:15:11Z https://chipmusic.org/forums/post/238866/#p238866