Ok, I will try that.
Andreas

On 25/06/2020, 13:32, "A discussion list for users of Csound on behalf of Victor Lazzarini"  wrote:

    you need to run this to a file (not fout) instead of DAC (-o filename) to test.

    Prof. Victor Lazzarini
    Maynooth University
    Ireland

    > On 25 Jun 2020, at 09:22, Andreas Bergsland  wrote:
    > 
    > *Warning*
    > 
    > This email originated from outside of Maynooth University's Mail System. Do not reply, click links or open attachments unless you recognise the sender and know the content is safe.
    > 
    > It didn't make any difference using CoreAudio or external sound card on OSX before, and I doubt this is the issue now. What I really don't get is that this also happens using fout, which simply writes to file. So in principle it doesn't really go through the DAC at all.
    > But I don't know Linux well enough to tell if this can be related to ALSA or anything else, like the audio coding on the system. BTW, I was using fout with format option 8, 24-bit integers with a header, and default header type (wav).
    > Best,
    > Andreas
    > 
    > On 25/06/2020, 09:58, "A discussion list for users of Csound on behalf of Peter P."  wrote:
    > 
    >    * Andreas Bergsland  [2020-06-25 09:37]:
    >> Hi
    >> I am puzzled by the fact that a .csd I wrote can run nicely on OSX, writing a file (with fout) without any distortion (max amp at ca.0.5), and then produce a severly distorted file when running the same .csd on a Linux system with ALSA.
    >> Any ideas what might be causing this? Are there any settings I could check for the ALSA driver? Or could it be related to the playback of the soundfiles I use in the project?
    >    I think it is could be OS X which automatically limits its audio output
    >    before it is sent to the built in dac. Makes my students write
    >    computermusic that distorts on other computers than their latest
    >    expensive apple laptop. Try on OS X with an external interface, it
    >    should clip there as well or use a good VU meter to check levels
    >    pre-dac. On Linux, there are good and precise meters in the x42-plugins package.
    > 
    >> BTW, the Linux system (Xubuntu LTS 18.04) produces distorted output for other apps as well.
    >    Well, do these apps output signals above 0dBFS (see "meters" above)?
    > 
    >    cheers, P
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