[ubuntu-studio-users] Converting a recorded track to a timing track

[Pietro Bergamo]

Hi.In my (not so big) experience, "fluid" tempos and pulses are really hard to sync, as Ralf said. 
I recorded recently a song with many tempo/measure changes and I couldn't find any way to make organically. In the end, I kind of cheated. On a rallentando, for instance, I split the measures in several pieces so that the metronome would count the eight notes or the sixteenth notes, thus making it easier to follow the pulse when recording. For each situation, I tried to find a (often different) solution. But I prepared the whole tempo track all in numbers, not through any kind of tapping or beat detection.
For me, tapping the tempo (or recording an audio with it) doesn't work very well because I find it hard to replicate the intention I had when I'm playing a different instrument. I find it even harder when other people are going to play. An "artificial" tempo is, for me, always easier to predict, making the recording more precise and demanding less editing. In the end, I think it sounds more natural this way.But, as I said, I'm not that experienced, so maybe there are better solutions out there.I hope this was of some help.Best regards,Pietro
 

    Em Segunda-feira, 26 de Dezembro de 2016 10:09, Ralf Mardorf <ralf.mardorf at alice-dsl.net> escreveu:
 

 Hi,

you need a sequencer that records a tempo map following you tapping a
key. This automatically would set the tempo, BPM in relation to the time
code position. This works very well to sync a sequencer to "averaged
normal music" played by real musicians. After or before doing this you
still need to manually edit the signature. No software is able to
detect if you are playing 3/4 followed by 2/4 or if you are playing
5/4. Apart from this, if you are really playing by pulse, recording a
tempo map might be more or less impossible, since when you actually
wouldn't count, you need to count, resp. tap, so that the sequencer
knows at what tempo you are, where quasi no tempo exists. In short, a
feature to sync a MIDI sequencer to human played audio tracks by
tapping a key does exist since decades, even to analog audio tapes
where the sequencer is synced by SMPTE. I guess you won't find this
feature provided by Qtractor. There only seems to be    View > Tempo
Map > Tap    to set a tempo at a given position, not to generate a
tempo map while playing the song. Maybe Ardour, Rosegarden or another
Linux sequencer provides it. I suspect that assuming Ardour's Rhythm
Ferret should still exist and assuming it should work, it just would
work for "averaged normal music",
https://community.ardour.org/a3_features_ferret . However, beat
detection is for sure less good than tapping, if you are playing by
pulse. Sync is an issue for all computer platforms, but Linux for sure
is by far the weakest platform in this domain.

Regards,
Ralf

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