Hi Mathias :) why do so many people reply off-list, when they do have quality issues with Linux? Linux for audio has a lot of disadvantages and I seems to be the only one pointing it out in the lists, while a lot of people do agree off-list.
Please, this is a serious issue that should be discussed on the lists. Mathias Krause wrote: > Hi Ralf, > > >> I guess we've got different trouble. >> >> In my case it's not the fault of JAMin. Indeed changing the volume and >> using a (multi-band) compressor will effect the frequencies depending to >> the compressor settings. >> >> For the first recording the output of JAMin was connected to Qtractor >> audio in, but the result of the recording sounds different to the sound >> that directly came from JAMin. >> >> The second recording was just audio track output, no JAMin, but directly >> connected to audio track input. Changing the level by listening all >> frequencies were fine, but for the recording there was a loss for the >> frequencies. >> >> 1. I used best playback quality for Qtractor. >> 2. The recorded wave files also sound muddy when I play them by another >> application. >> >> In your case it seems to be your fault ;). If you change the volume for >> the audio signal that you connect to JAMin's inputs, then at least you >> need to readjust the ratio. >> > > I don't think it's different trouble... but let me check it this > afternoon. What I do is connecting the output of Jamin to qtractor and > re-record the track. If i listen to the audio signal which comes out of > jamin, everything sounds ok. I also use qtractor level adjustment to set > the audio level. When I listen to the re-recorded track, it sounds a > little distored ... > > but until sending something to the list ... i will try it again. Simple > way would be to record the output of Jamin with another application, isn't > it? > > Regards, > gizzmo > What are your playback settings for Qtractor? Take a look at "View > Options >" or use Ctrl + F12. Chose the tab "Audio", the sample-rate converter type for playback needs to be set to "Sinc (Best Quality)". I've got this muddy sound also when I connect the output directly to the input of Qtractor, without having JAMin launched. Listening to the output that should be recorded anything is fine, but for the recording there is something missing. One theory is, that there is a problem because of no dithering, but I've got experiences with simply recording and copying digital audio and this shouldn't be the cause. I suspect Linux has got some bugs, because even recordings at 96/24 done with Linux sounds less good than a consumer DAT recording at 48/16. When I said there's noise because of JACK I was called a troll, some years later a coder discovered that there was a rounding error that indeed produced noise. Doing a recording within Linux, by *not* using the sound card, there shouldn't be any trouble because of the sound quality, excepted of dithering issues. Most times this is fine, but often it fails, sometimes because of user errors, e.g. bad settings for JACK can cause phase trouble. Even if there are *no* messages like xruns, the settings for JACK can be bad. OTOH not seldom Linux it fails because there must be a lot of bugs for JACK and other applications. I'm absolutely sure. But when I rerecorded a track, just with a raised volume, *no* JAMin etc., I should get what I hear. I can't use another application if I need to record an audio track that I need to use with Qtractor, I only could use another application for the mastering. In my case there might be a bug in Qtractor. Please test Qtractor without using JAMin too. Cheers, Ralf _______________________________________________ 64studio-users mailing list [email protected] http://lists.64studio.com/mailman/listinfo/64studio-users
