Spontaneous tempochange of wav files?

[mickeh]

We have a strange issue:

A friend of mine has made a song in CMusic, bounced some of the tracks and first it worked fine (He made a downmix, made an mp3 that he mailed me).
After that the program crashed, and he can't open the mussesion-file at all.

He came over to me with all the files.
We can open the project in my full, registered version of Luna but for some reason the bounced tracks are replayed in 110 BPM (the project are in 120).

Played in any other application as standalone wavs they are still in 120 BPM.

Now we're sitting here and wonder if we have to remake it, and then, will the error occur once more...?

Is it a bug, or something we've missed out (And believe us, we've been searching.....)

[muzycian]

I guess when you play the song, and it's at a lower tempo, also the pitch is lower, right?

That's because there is a difference between the samplerate of your friends card and your audio card's samplerate.

My guess: your friend samplerate = 48000 Hz, your samplerate is 44100 Hz.
That will indeed result in a tempo difference of 120 / (48/44.1)) = 110.25 bpm.

Solution is to resample the audiofile from 48 to 44.1 kHz in an audio editor (e.g. audacity). If you do that, it's best to work on a copy of the original file so that you don't loos the original.

Now about the crash: when did the program exactly crash? Was that straight after the mixdown? Is that crash repeatable? (please try it with some test files that can't hurt).

Also, feel free to email me the musession file that can't be opened anymore, i'll have a look at it, and maybe i can recover it.

Cheers,

Jo

[mickeh]

I guess when you play the song, and it's at a lower tempo, also the pitch is lower, right?

Yep, correct! Forgot to mention that.....

That's because there is a difference between the samplerate
of - - - Solution is to resample the audiofile from 48 to 44.1 kHz in an audio editor - - -

Yes, thank you, it worked perfectly
Sorry for missing something out, but how come?
When I play his bounces in other programs that handles different samplerates it plays up correctly (Audacity, Foobar, Audition etc.)

Has it anything to do with Luna/Cmusic or the ASIO driver? (Just out of curiosity).

Now about the crash: when did the program exactly crash? - - -

Cheers,

Jo

I'll tell Bjorn to answer that, so you'll get the proper info direct from the source...


Thanks for the help!

/M

[muzycian]

Yes, thank you, it worked perfectly
Sorry for missing something out, but how come?
When I play his bounces in other programs that handles different samplerates it plays up correctly (Audacity, Foobar, Audition etc.)

Has it anything to do with Luna/Cmusic or the ASIO driver? (Just out of curiosity).

It's just a simplicity of LUNA, to be improved in a future release.

I'll tell Bjorn to answer that, so you'll get the proper info direct from the source...
Thanks for the help!
/M

Happy Newyear