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Calling all MIDI guitarists
Author: cornbb on November 16 2006 Viewed 1405 times. 2 people liked this blog. You can rate it below if you haven't already.
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Don't know if anyone will be able to help me, but here goes anyway.. I'm working on a software product, one of whose aims is to dynamically generate MIDI sequences which will be sent to a sampler plugin to generate realistic guitar sounds. In order to figure out what to do next, I need to analyse some MIDI files of guitar solos which contain plenty of expressive data, eg pitchbends, hammer-ons, etc. I imagine the best such file would be one which was recorded by a decent guitarist using a decent MIDI pickup. I can't seem to find such files by trawling through the millions of MIDI files on the web. Any suggestions? | |
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11/16/06
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xik
I hate to say it but IMHO its a lost cause, like trying to synthesize violin ect, just hang on #musicdsp and see what the devrs there think of the idea. I know some of them have messed with guitar pitch detectors and other various guitar dsp things.
edited: Nov 16 2006
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Roshi
Very cool idea. You might want to look into synful - they do something similar to simulate different articulations for orchestral instruments.
I was playing with the idea of a midi plug that would simulate the harmonics based on what notes you have played (i.e., the plugin guesses which string you play and adds in notes whose overtones are related on the available open strings). Slayer (by refx.net) does something very similar in their implementation of simulated guitar feedback.
11/16/06
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cornbb
Thanks for the tips. You have a point xik. I think MIDI can do a reasonably good job of conveying the proper expressiveness when it comes to instruments like piano or marimba, but no one has done a great job of articulating guitar, violin, etc. We've developed algorithms which generate MIDI sequences but it sounds pretty terrible when sent to a guitar sample instrument, so we thought a few pitchbends and similar expressive stuff might improve things. The whole research area of conveying musicianship and expressiveness in electronic formats is pretty huge and very interesting.
11/16/06
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Roshi
The other issue might be that the multisamples do not really articulate everything the guitar is capable of. Slayer uses a physically modelled string. It doesn't sound convincing clean, but distorted, it sounds pretty darn close. Their approach lets them modify various parameters (such as body type, string type) and get a wide range of sounds. Perhaps with a wider range of articulations sampled would help you increase the realism of the instrument.
Marimbas and pianos can be more convincingly multisampled, perhaps, especially since they are percussive instruments (you do not modulate the envelope after you do the initial hit).
The issue is especially hard for bowed instruments because essentially there are several different kinds of modulation the player can do to change once the inital attack is started.
This is a really hard problem and I'll be interested in seeing what you guys come up with. Good luck!
11/16/06
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quip
Yeah I like slayer. I play guitar lots and have to say its really hard to emulate. All the bends, fakes, hammerons, harmonics, slides. Thats alot of shit. Good luck!
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