[LAD] Polyphonic normal guitar to midi: Jam Origins' MIDI-Guitar

[Tim]

On 06/26/2018 02:44 AM, Bengt Gördén wrote:
> Den 2018-06-26 kl. 00:31, skrev Tim:
>>
>> I read they use more than just spectral stuff.
>> Like AI used in speech recognition and so on.
> 
> <snip>
> 
>> Amazing what DSP audio and image coding can do these days.
>> Any thoughts on coding techniques? I've read a lot of papers!
>> Some say using FFTs + auto-correlation comparisons.
>> Some say non-negative matrix.
> 
>  From the abstract of the patent [1] [2]
> 
> "An audio matching method, use of the method in a game system, an audio
> matching system and a data carrier are provided, where the audio
> matching method is for comparing an input audio fragment with reference
> audio fragment variants, the method being an incremental search method,
> including repeating the steps of: obtaining a number of reference audio
> fragments variants on the basis of one or more stored audio fragments
> from a reference storage; and comparing the input audio fragment against
> the number of reference audio fragment variants to determine a
> comparison result; whereby repetition of the steps is carried out a
> predetermined number of times or as long as the comparison result improves."
> 
> SOS had a review of it 4 years ago [3]
> 
> 
> ref.
> [1]
> https://patentimages.storage.googleapis.com/93/f6/7b/30b78e5067b5e5/US20120132057A1.pdf
> [2] https://patents.google.com/patent/US20120132057A1/en
> [3] https://www.soundonsound.com/reviews/jam-origin-midi-guitar
> 
> Cheers,
> 

Awesome. Thank you for that.
I am always late to the party, but I can't help gushing
  over this thing since I have a special interest in it.

Tim.