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1  Using Arduino / Audio / Re: Audio matrix mixer on: February 28, 2012, 10:41:25 am
If someone could look at the ingredients and let me know if I'm barking up any kind of reasonable tree I'd appreciate it!
2  Using Arduino / Audio / Audio matrix mixer on: February 26, 2012, 09:50:05 am
I'd like to build a 4 in 4 out audio matrix mixer controllable by Arduino. The purpose is 'no input' style feedback generation using graphic eq guitar pedals patched between the outputs and inputs. I'd be using Maxuino to send attenuation ramps and routing commands from Max/MSP to the Arduino.

Any suggestions and/or pointers to potential challenges would be appreciated!

The mixer would:

— allow routing of any combination of outputs to any combination of inputs
— allow attenuation of the signals in the feedback paths

Possible ingredients:

ADC: UDA1361TS <http://www.nxp.com/documents/data_sheet/UDA1361TS.pdf>
DAC: UDA1352TS <http://www.nxp.com/documents/data_sheet/UDA1352TS.pdf>
Matrix routing: MAX4549 via SPI library <http://datasheets.maxim-ic.com/en/ds/MAX4548-MAX4549.pdf>
Attentuation:   AD5206 via SPI library <http://www.analog.com/static/imported-files/Data_Sheets/AD5204_5206.pdf>
Arduino Mega
3  Using Arduino / Networking, Protocols, and Devices / Re: iPhone joins standalone Arduino network on: August 17, 2011, 02:29:19 pm
Thanks for the info— too bad the kits are back-ordered. I'll post whatever I find out.
4  Using Arduino / Networking, Protocols, and Devices / iPhone joins standalone Arduino network on: August 17, 2011, 10:22:00 am

I'm wondering if iPhone users could join a standalone network created by multiple Arduinos (i.e. with no computer setting up the local network).

Perhaps using Meshlium or the new Xbee WiFis?

Any pointers appreciated!
5  Using Arduino / Audio / Audio matrix mixer on: February 20, 2011, 05:25:13 pm
I'd like to build an audio matrix mixer in Arduino to control from MAX/MSP:

—ideally would be a matrix mixer (say 4 in and 4 out) where any combination of inputs could be sent to any combination of outputs

— these sends ideally would have gain control or passive attenuation. Simple on/off would be OK too.

— EQ filtering with parameters dynamically setable from MAX would be great too.

The purpose is to automate with Max/MSP a 'no input' feedback system.

The info I have so far:

3 X 3in/2out chip
http://www.maxim-ic.com/datasheet/index.mvp/id/2046

>>Just use the SPI library to talk to this one, very simple connection.
3-Wire SPI/QSPI/MICROWIRE-Compatible (MAX4549)

I'm guessing something like the Arduino Duemilanove would be the bridge between MAX on my computer and the 4549 chip?

After looking at the data sheet for the MAX4549 (with very limited knowledge) it's unclear how audio is sent to/from the chip.

 Any pointers would be appreciated!
6  Forum 2005-2010 (read only) / Interfacing / Re: Analog audio mixer controllable via MAX/MSP on: November 16, 2010, 08:00:58 pm
Thanks for your reply! I found the following chips that look useful-- just wondering what Arduino hardware would be necessary for the project:

3 X 3in/2out
http://www.maxim-ic.com/datasheet/index.mvp/id/2046

mic preamp
http://www.maxim-ic.com/datasheet/index.mvp/id/3406
7  Forum 2005-2010 (read only) / Interfacing / Analog audio mixer controllable via MAX/MSP on: November 16, 2010, 06:59:32 pm
I'm wondering if the following would be possible using Arduino, and if so, what hardware would be required:

Analog audio mixer controllable via MAX/MSP

—ideally would be a matrix mixer (say 4 in and 4 out) where any combination of inputs could be sent to any combination of outputs

—ideally these sends would have gain control or passive attenuation. Simple on/off would be OK too.

— alternatively one-channel active or passive gain controls or on/off gates would work.

The purpose is to automate with Max a 'no input' analog feedback systems using guitar effects pedals.

Any pointers much appreciated!
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