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 Forum index » DIY Hardware and Software » Microcontrollers and Programmable Logic
AVR Synth
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gurutzeta



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PostPosted: Sat Jan 12, 2008 1:41 pm    Post subject: AVR Synth Reply with quote  Mark this post and the followings unread

I have just finished recasing my AVR Synth. Pictures here:

http://blog-desorden.blogspot.com/2008/01/new-case-for-my-avr-synth.html

great project for a DIY beginer!!! You can get the kit from elby designs:
http://www.elby-designs.com
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State Machine
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PostPosted: Sat Jan 12, 2008 3:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

Guru, I hope you don't mind, I moved the topic here in the sub forum ..... Very Happy

Bill
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gurutzeta



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PostPosted: Sat Jan 12, 2008 4:13 pm    Post subject: Reply with quote  Mark this post and the followings unread

State Machine wrote:
Guru, I hope you don't mind, I moved the topic here in the sub forum ..... Very Happy

Bill


I did not notice there was a microcontrollers sub forum. Sorry and thanks!!
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State Machine
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PostPosted: Sat Jan 12, 2008 5:46 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
I did not notice there was a microcontrollers sub forum. Sorry and thanks!!


Oh no need for "sorry" Very Happy The sub-forum is new ...

I would really like to hear some sound examples from you AVR synthesizer. Do you have any recordings ?

Thanks.
Bill
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gurutzeta



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PostPosted: Sun Jan 13, 2008 4:11 am    Post subject: Reply with quote  Mark this post and the followings unread

There are some samples here:
http://www.jarek-synth.strona.pl/

and I am working also in preparing some samples, but I am more a maker than a player Laughing
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gurutzeta



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PostPosted: Sun Jan 13, 2008 6:46 am    Post subject: Reply with quote  Mark this post and the followings unread

Here goes an example of how the AVR synth sounds like. The Drum sound comes from a PC sequencer, which is also generating the arpeggio that repeats again and again (and again and again and again...) while I change the AVR Synth settings. I think this sample can give a good idea of how the AVR Synth can sound like


AVR Rendered.mp3
 Description:
Arpeggio running through my AVR synth while I change it setting almost randomly

Download (listen)
 Filename:  AVR Rendered.mp3
 Filesize:  1.48 MB
 Downloaded:  1022 Time(s)

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State Machine
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PostPosted: Sun Jan 13, 2008 8:16 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Here goes an example of how the AVR synth sounds like


Wow, thanks for cooking up that AVR cool bass line !!! Cool A good example of what an 8 bit MCU is capable of in terms of musical applications. The AVR synth sounds like a very capable sound module. Sounds like you were adding some LFO frequency modulation. I also heard multiple voices, like two with one bing transposed by an octave?

Thanks for the example ....... I will have to go over to that website and take a peek and hear more samples.

EDIT:

Just went over to take a peek at the schematic and sound examples and I tell you, sound sample #3 really could be the patch for the lead synthesizer line in ELP's "Luck Man" with that portamento setting and piercing voice !!!!! Nice !!!!

Bill
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gurutzeta



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PostPosted: Sun Jan 13, 2008 9:31 am    Post subject: Reply with quote  Mark this post and the followings unread

State Machine wrote:
Wow, thanks for cooking up that AVR cool bass line !!! Cool A good example of what an 8 bit MCU is capable of in terms of musical applications.


No problem, I am glad you liked it.

State Machine wrote:
Sounds like you were adding some LFO frequency modulation.


The AVR synth has an LFO which can be used to modulate the DCO or the DCF. The LFO depth can be controlled with the Mod Wheel.

State Machine wrote:
I also heard multiple voices, like two with one bing transposed by an octave?


There are two voices, both controlled by midi. Each of the two voices can be changed of octave with the flick of a switch and one of them can be detuned with one of the knobs.


State Machine wrote:
Just went over to take a peek at the schematic and sound examples and I tell you, sound sample #3 really could be the patch for the lead synthesizer line in ELP's "Luck Man" with that portamento setting and piercing voice !!!!! Nice !!!!

Bill


Check also Daniel Krue Modifications to the software: http://krue.net/avrsyn/

You would need an ATMEGA32 and a 16MHz clock to run those though (I still have not modified my synth with those changes).
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