asked Aug 14 '16 at 16:49 by Skorpion (11)

I have recorded a midi track playing two handed, resulting in a single midi track.

I'd like to have separate tracks for the treble and bass line.

Is there a way to either split the track post-production based on pitch, or configure the instrument to produce two tacks while recording using the arranger write mode?

Hi,

there is a Bitwig device that may come handy for you: the note filter. It allows you to filter notes based on pitch (key) and/or velocity. Here, the key parameter looks useful.

The solution I will give you may have some shortcoming at the mixing stage, as both "voices" are contained in a single track. so you may need to mix in the device chain, or create other tracks, each holding an Audio Receiver device, receiving the audio from the layers. This way you can use the mixer as usual, as if each layer was routed to its own channel.

So have a look:

alt text

I put 2 layers in a an FX layer. Layer 1 is the bass where I use the note filter to "ignore" key higher than... "59", which is B2 if I make no mistake.

Layer 2 is the treble, filtering every note under "60" which is C3 (ok, not that treble !).

alt text

When you record, you get a single midi clip. Note filter does the pseudo "routing". You can use different instrument on each layer. Notice that you can also use a different order in the layers than me: instrument first, then note filter as a note FX (for Bitwig instruments, not VST).

If you prefer have multiple tracks, the note filter can be used the same way. Make sure you arm every needed track. But as the note filter seems to be effective on playback only, recording will record every note and you will get the same midi clips on every armed tracks.

link

answered Aug 14 '16 at 19:44 by pakunoda (936)

edited Aug 14 '16 at 20:17

Thanks for the tip on the Note Filter. Since I needed to use 2 VST plugin instances to get the different instrument voices, I just created two different tracks and hooked both to the same MIDI instrument as input. Then I put a note filter on each track along with separate instances of the VST plugin.

I hit the character limit but I'll put a slightly more detailed version of this as an answer as well. Thanks again!

  — (Sep 12 '16 at 15:56) Skorpion

Thanks for the tip on the Note Filter. Since I needed to use 2 VST plugin instances to get the different instrument voices, I just created two different tracks and hooked both to the same MIDI instrument as input. Then I put a note filter on each track along with separate instances of the VST plugin.

So:

Track 1: MIDI Keyboard -> Note Filter -> VST Plugin Track 2: MIDI Keyboard -> Note Filter -> VST Plugin

Then I arm both Track 1 & Track 2 for recording at the same time.

As an added bonus since my contrller has an octave shift function, I can get a wider range with either instrument.

Only problem is I end up hitting my VST plugin limit right away because of this, but it is working fine for now.

Thanks again for the idea about hteNote Filter!

link

answered Sep 12 '16 at 15:56 by Skorpion (11)

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Asked: Aug 14 '16 at 16:49

Seen: 1,475 times

Last updated: Sep 12 '16 at 15:56