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 Forum index » DIY Hardware and Software » Microcontrollers and Programmable Logic
A Synthesizer Made of Only Filters
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JLS



Joined: Nov 05, 2005
Posts: 419
Location: Czech
Audio files: 16
G2 patch files: 275

PostPosted: Wed Jun 08, 2011 11:44 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi JovianPyx

Any news about this ? All yours projects very interesting for me Smile

Thanks info Kamil

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JovianPyx



Joined: Nov 20, 2007
Posts: 1214
Location: West Red Spot, Jupiter
Audio files: 157

PostPosted: Thu Jun 09, 2011 5:57 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi JLS,

Not much news really. After I expanded the Tonal Drum to 55 drums, I recorded Bach's Brandenburg Concerto Number 5 Movement 1 from a nicely done MIDI file I downloaded. The Tonal Drum is in there - the very sine sounding instrument is the Tonal Drum.

I don't know if I can get any more drums at the high end, the filters go berserk easily at that end of the spectrum, but 55 is very useful.

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JLS



Joined: Nov 05, 2005
Posts: 419
Location: Czech
Audio files: 16
G2 patch files: 275

PostPosted: Thu Jun 09, 2011 6:21 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi

Sound is great nice work Smile

Kamil

P.S. is possible post source code for Spartan3E500 ? Thanks

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JovianPyx



Joined: Nov 20, 2007
Posts: 1214
Location: West Red Spot, Jupiter
Audio files: 157

PostPosted: Thu Jun 09, 2011 6:34 am    Post subject: Reply with quote  Mark this post and the followings unread

The 55 drum version is for a Spartan-3A 400K gate FPGA. I looked at the source code and the 3E version is 32 drums, but the current patch editor (required to tune the drums) won't work with the 32 bit version... I don't know when I'll have time to port it.
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kkissinger



Joined: Mar 28, 2006
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Location: Kansas City, Mo USA
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PostPosted: Thu Jun 09, 2011 6:46 am    Post subject: Reply with quote  Mark this post and the followings unread

JovianPyx wrote:
Hi JLS,

Not much news really. After I expanded the Tonal Drum to 55 drums, I recorded Bach's Brandenburg Concerto Number 5 Movement 1 from a nicely done MIDI file I downloaded. The Tonal Drum is in there - the very sine sounding instrument is the Tonal Drum.

I don't know if I can get any more drums at the high end, the filters go berserk easily at that end of the spectrum, but 55 is very useful.


Beautiful track -- very colorful. And really clean, too.

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JovianPyx



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Audio files: 157

PostPosted: Thu Jun 09, 2011 11:05 am    Post subject: Reply with quote  Mark this post and the followings unread

Thank you Kamil and Kevin!
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JovianPyx



Joined: Nov 20, 2007
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Location: West Red Spot, Jupiter
Audio files: 157

PostPosted: Thu Nov 10, 2011 4:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

I've expanded the Spartan-3E Starter Kit version. It now supports 55 resonators. Sample rate of 150+ kHz. DDR SDRAM supports 55.7+ seconds of looped delay.

The reason for the 55 resonators and not 64 is that the higher in pitch a state variable filter is used, the tricker it is to keep resonance from turning into runaway oscillation. Even at 55 the top 8 or 9 resonators had to be hand tweaked.

_________________
FPGA Synth Stuff
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