metronome in qtractor

Submitted by hardbop200 on
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qtractor

Hello Rui!

I've just installed qtractor from the Debian Unstable repo. I've been looking around and checking things out, and I have been very impressed so far.

I see in the toolbar that you can set bpm information for the song, but I cannot find a place to set metronome parameters. Can you help?

Thank so much,

Josh

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Hi Rui,
Sorry I've not been too responsive in the past several days. We have had major Internet issues at the company I work for, so I have been putting in some serious mega-hours. I am confident the problem will finally be fixed tomorrow. Sigh!

Anyway, I had thought I would just create some custom samples, that I would send you, and you could license them however you see fit. However, I didn't really consider the vast quantity of free samples available on the Internet. Doh!

I guess it could be simple to find something under a genuine free license. I'll look around this evening and see if I can come up with anything that meets your approval.

Thanks,
Lexridge

Submitted by matpod (not verified) on Mon, 7 Jan 2008 - 15:06

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I'd vote for atonal ones like rim shot.
definately let the user choose as well,
but just nice if you turn on metronome and it just works straight away. :)

Submitted by Anders Dahnielson (not verified) on Sun, 11 Jan 2009 - 22:23

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I'm using the MIDI metronome and it appears that what beat Qtractor emphasize is a bit of a mixed bag. Only rarely does it emphasize the bar (the "downbeat" as it should). When I hit play it emphasize in order:

* 4th beat in the first measure
* 1th beat in the third measure
* 2nd beat in the fourth measure
* 3rd beat in the fifth measure
* and repeat...

At least it follows a pattern. Unfortunately not the correct one for a metronome.

(I'm running Beat/4 and 100 BPM.)

Qtractor's metronome should emphasize the first beat of each measure only (ie. bar). Well, it's not quite an emphasis, but it has distinct samples or click events for the bar (1st beat) and for the remaining beats (2nd, 3rd, etc.). Emphasis thus depends on the particular sample (audio metronome) or event (MIDI metronome; note, velocity) that you setup in Options.

If that's not exactly what you hearing that's because there's a bug, somewhere :)

May i ask which metronome you're using? audio, MIDI or both? (nb. having both types might render some clashing, phasing and/or over-beat effect when in the air, probably, just remotely probable, the kind of patterns you're hearing:)

Cheers.

I'm using the MIDI metronome (the sound is produced by LinuxSampler using my favorite click sounds). I'm using MIDI note #76 for both "bar" and "beat" clicks but with velocity 96 for bars and 64 for beats.

The audio metronome is disabled.

There appears indeed be some kind of bug, counting five beats to the bar except the first measure that is three.

And which Qtractor version? tempo? time-signature?

Try disabling the MIDI metronome and retry with the audio metronome enabled. Try with some short but distinct bar and beat audio sample files. See (hear) whether the strange patterns you report occur as bad.

On all my tests with released 0.3.0 and latest CVS, both metronomes work as designed (ie. no bugs found;) Maybe I'm missing something ... it happens all the time :))

Seeya

The audio metronome work as expected. The MIDI one does not.

* Version 0.3.0
* 4/4
* 100 BPM

(Edit: Oops. I mistook the "snap to beat" for the time signature at first.)

Submitted by rncbc on Mon, 12 Jan 2009 - 22:16

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I'm sure missing something. Can't really reproduce the extra beat in the MIDI metronome measure. Can you trace the MIDI events with aseqdump and verify you get something like this (Beats/Bar=4) :

Source  Event                  Ch  Data                                         
  0:1   Port subscribed            130:0 -> 129:0                               
130:0   Note on                 9, note 76, velocity 96                         
130:0   Note off                9, note 76, velocity 0                          
130:0   Note on                 9, note 77, velocity 64                         
130:0   Note off                9, note 77, velocity 0                          
130:0   Note on                 9, note 77, velocity 64                         
130:0   Note off                9, note 77, velocity 0                          
130:0   Note on                 9, note 77, velocity 64                         
130:0   Note off                9, note 77, velocity 0
130:0   Note on                 9, note 76, velocity 96
130:0   Note off                9, note 76, velocity 0
130:0   Note on                 9, note 77, velocity 64
130:0   Note off                9, note 77, velocity 0
130:0   Note on                 9, note 77, velocity 64
130:0   Note off                9, note 77, velocity 0
130:0   Note on                 9, note 77, velocity 64
130:0   Note off                9, note 77, velocity 0
130:0   Note on                 9, note 76, velocity 96
130:0   Note off                9, note 76, velocity 0

seeya

[EDIT: Whoa! Stop the press: I've noticed a glitch: sometimes, well, pretty repeatable, there's these duplicated MIDI metronome events being queued. This might be related to your problem, maybe not. Wonder why linuxsampler offsets duplicated note events (most MIDI sound modules I tested seem to ignore dupes, but I just might be lucky:). Check that out on qtractor 0.3.0.1193+ from CVS.]

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