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bpm is not correct, how can i fix it?

3 replies [Last post]
G.o.D
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Joined: 04/17/2010

hello, first thanx for this great tool. it is a big step forward into making linux a competitive audio workstation.

i have a problem with the bpm value. i have several hardware and software tools that provide a bpm value for giving the timing. if i set up e.g. 120bpm, than all the tools run at exactly the same speed... except hydrogen.

i tested a bit around and i think as long as you do only a few beats per pattern it seems to be in sync (more or less) but wenn adding a more complex pattern it gets out of sync to all the other bpm sources after a while. i run hydrogen with jack 0.94 and ardour. a friend who runs hydrogen via oss has the same problem.

i never heard anything about this problem in the forum or anywhere else, so i assume its a problem that may not be to everyone.

this is a big problem to me, as i usually record 1st with reallife metronome, adding drums later.

is this a known problem and are there any ideas for a workaround?

thanx,
heiko irrgang

Comix
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Joined: 04/17/2010

this bug should be fixed in the 0.8.2 version, maybe this could be another one... :(
what version of hydrogen are you using?

G.o.D
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Joined: 04/17/2010

well, i had 0.8.2 installed so i did some tests...

fist of all, the reason i thought hydrogen is still heavily out of sync was the metronome of my digitech guitar fx panel... i havent compared this one to my other - as i compared a lot of hardware/reallife metronomes and they where exactly the same, so i assumed that this will be fact for this too. i used this for recording... and man, this crap is way out of sync.

so it seems hydrogen is 100% in sync with ardour, no matter if used with jack transport or not. so is muse. the metronomes of the yamaha dd-55 drumcomputer and the boss br-8 multitrack recorder are in sync to each other, but compared to hydrogen they are slightly slower. youll notice this after at least recording 5 mins. so its almost in sync but slightly out...

additionally i tested noteedit which is once more completely out of sync... shouldnt bpm be beats per minutes which means exactly the same no matter what source...

so now im not sure whos right, the hardware metronomes or hydrogen/ardour/jack/muse, but there are still some differences... slightly only but they are...

bennyp
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Joined: 04/17/2010

I have the same problem in hydrogen 0.8.2 I first noticed it when i would mix hydrogen with freebirth. This bug has led to some embarassement when i couldn't beatmatch to the DJ at a live performance =).
I have also found it a bit annoying that hydrogen does not return the song cursor to the initial position when pressing stop sometimes... that can make it very hard to beatmatch as well...
Thank you Hydrogen dev's for an awesome (and superior, IMO) linux alternative sequencer