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RE: guitarists: triple play?



Yes, I misspoke - I should have said "representation in sound", not detection. But what Andy said, all of that.

> Date: Mon, 5 Jan 2015 11:45:51 +0000
> From: akbutler@tiscali.co.uk
> To: Loopers-Delight@loopers-delight.com
> Subject: Re: guitarists: triple play?
>
>
>
> On 05/01/2015 09:35, Diarmuid Pigott wrote:
>
> > My own experience of MIDI from strings is that the detection of vibrato and bend and gliss is pretty much
> > dependant on the MIDI instrument I am using.
>
> I think there's a bit of a miss-conception going around.
>
> The Midi instrument actually has nothing to do with detection,
> it only responds to midi commands.
> By then the detection is already done.
> What *is* important is that the Midi instrument needs to respond
> correctly in order to interpret the pitch information correctly.
> i.e. the amount of pitch change in response to MidiPitchBend has to be set correctly.
> That's actually rather trivial to set up, as long as the midi instrument supports it.
>
> For a device like the Fishman the situation is a bit different, in that
> there may be processing of the audio from the pickup.
> In that case it's obviously possible to pass the audio in some form and
> get what seems like "perfect tracking", when no tracking has been needed.
>
> For note detection there's an absolute limit that's never going to be beaten.
> I look at it from a slightly different angle to the usual idea of note frequencies.
> The impulse from plucking the string has to travel up to the fret and back to the pickup
> before it's possible to calculate which fret was used.
>
> Using that way of looking at things the Axon system can make a the quickest possible
> guess at what the note played is, then it uses a more regular analysis to measure
> the frequency. Should the initial guess be wrong a correction is made to the Note-On
> that was sent using MidiPitchBend.
> As the Axon system is patented then it kind of looks like no-ones going to get
> faster tracking without licensing it.
>
> Warbling on a sustained note occurs when the fundamental of the note fades before the harmonics,
> so on some instruments there'll be one or two notes that warble every time.
> Just down to the resonance of the instrument.
> If the instrument is specially designed to work with midi convertion I suspect
> they spend a lot of time working removing any 'bad notes'.
>
> If there's going to be any improvement over the Axon system it won't
> be in fast detection of the note, but rather in the ability to
> keep tracking a note as it dies away.
>
>
> andy
> ps. for playing around, the monophonic devices by Sonuus have somewhat slower note
> detection but are fairly warble resistant.
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