[islandlabs] How to: Play Guitar Hero with a Real Guitar

[Burns, William]

Does "tomorrow" mean Friday, or Saturday?

-Bill 

> -----Original Message-----
> From: list-bounces at islandlabs.org 
> [mailto:list-bounces at islandlabs.org] On Behalf Of Jonathan Dehan
> Sent: Friday, March 06, 2009 5:03 AM
> To: Island Labs main mailing list
> Subject: Re: [islandlabs] How to: Play Guitar Hero with a Real Guitar
> 
> Soldering isn't the best idea - for prototyping, tape should 
> be ok. If the concept works well, I would totally be for 
> making the rig permanent though. It would also be nice to get 
> a head count for 5 or 7 pm tomorrow, since I will have to 
> drive in from manhattan and then back again after the 
> meeting.  If it is just 2 of us, it might be better to meet 
> next week. It looks like both the guitar project and mame box 
> project can both move along next meeting, so wiki entries for 
> both should be made so we know what to bring each meeting.
> 
> --Jonathan
> 
> 
> 
> On Mar 5, 2009, at 10:03 PM, Peter Williams <petertw at gmail.com> wrote:
> 
> > So who wants an islandlab meeting tomorrow, and what time? (5 or 7?)
> >
> > If Jonathan brings his guitar we have everything we need to wire up 
> > the latest idea and see how it works. (If you don't mind us 
> soldering 
> > wires to the frets that is)
> >
> > Peter
> >
> > On Tue, Mar 3, 2009 at 1:51 PM, Jim Robert <jim.mixtake at gmail.com>
> > wrote:
> >> you could probably clip a piezo to your headstock or 
> bridge and use 
> >> it as a pickup... They work very well for this type of thing, and 
> >> there are some clip on guitar tuners that use the same concept.
> >>
> >> Then use a lowpass filter to get rid of as many of the upper 
> >> harmonics as possible...  (circuit to make a lpf here:
> >> http://en.wikipedia.org/wiki/Low-pass_filter)
> >>
> >> then get the frequency using an fft, and calibrate the system to 
> >> which frequency to use at each fret (or just get the 
> lowest one and 
> >> use a little math to calculate the rest)
> >>
> >> Voila :)
> >>
> >> I think that calibration is going to be inevitable since you can't 
> >> count on a guitar to be perfectly in tune (and even if you 
> can, you 
> >> can't count on your pickup to work exactly the same on 
> every guitar 
> >> OR that the frets will be perfect. Also, most people will not be 
> >> using pro level guitars, and small inaccuracies are very common
> >>
> >> you may also want to add a function that keeps track of 
> the pitch of 
> >> the last 20 notes and calibrate the system on the fly to 
> keep loss of 
> >> intonation in check, which happens naturally as you play no matter 
> >> what you do.
> >> One more idea about detecting strums... I would use 
> amplitude to do 
> >> this...
> >> many guitar players (myself included) rest their hand on 
> the strings 
> >> to mute them and accidentally touching the pick to a string would 
> >> happen all the time.
> >> This is a really cool project, I'd love to be a part of it. Maybe 
> >> jonathan will let me do another blog post ;)
> >>
> >> Jim
> >> _______________________________________________
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> >>
> >>
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