Guitar->ADC->process->amp

Hawkward · 6th May 2009, 04:30 PM

Hi, I'm new to DIY boards. I came here to seek resources for a project I'm about to begin.

It would be a device to tune down or up an entire guitar.
You would play on a standard tuned guitar and the sound would be one of a tuned down 1 step guitar, or another setting.

I have a little background in microcontroller and logic circuits, as well as analogic electronics.

I looking for leads to what is best to use for a project like this. What should I use? FPGA? I just don't know exactly what to start researching.

If someone could help me get on track it would be greatly appreciated!

also, i've seen people talking about DIY projects, i can't find those. Is there a section with detailed project example on the site? or is it just a general term people use to talk about their do-it-yourself projects? if it's the first, maybe i could find something similar in those projects.

Thanks

mako1138 · 8th May 2009, 04:33 AM

This is a DIY audio forum, so the projects are scattered around in various threads.

It sounds like you want to build a pitch shifter. To get decent sound quality you'll need a lot of DSP power. I suggest you start out by using your computer for processing. Once you have a signal processing algorithm, you can then figure out how many operations (multiplies and additions) you need per second. Then you can consider a standalone hardware platform such as a DSP or FPGA.

Googling turns up a lot of useful stuff, such as
http://www.dspdimension.com/admin/pi...-using-the-ft/

6th May 2009, 04:30 PM	#1
Hawkward diyAudio Member Join Date: May 2009	Guitar->ADC->process->amp Hi, I'm new to DIY boards. I came here to seek resources for a project I'm about to begin. It would be a device to tune down or up an entire guitar. You would play on a standard tuned guitar and the sound would be one of a tuned down 1 step guitar, or another setting. I have a little background in microcontroller and logic circuits, as well as analogic electronics. I looking for leads to what is best to use for a project like this. What should I use? FPGA? I just don't know exactly what to start researching. If someone could help me get on track it would be greatly appreciated! also, i've seen people talking about DIY projects, i can't find those. Is there a section with detailed project example on the site? or is it just a general term people use to talk about their do-it-yourself projects? if it's the first, maybe i could find something similar in those projects. Thanks

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8th May 2009, 04:33 AM	#2
mako1138 diyAudio Member Join Date: Nov 2007	This is a DIY audio forum, so the projects are scattered around in various threads. It sounds like you want to build a pitch shifter. To get decent sound quality you'll need a lot of DSP power. I suggest you start out by using your computer for processing. Once you have a signal processing algorithm, you can then figure out how many operations (multiplies and additions) you need per second. Then you can consider a standalone hardware platform such as a DSP or FPGA. Googling turns up a lot of useful stuff, such as http://www.dspdimension.com/admin/pi...-using-the-ft/

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