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 Forum index » Clavia Nord Modular » Nord Modular G2 Discussion
G2 Hard- & Software Internals
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selvmarcus



Joined: Feb 08, 2006
Posts: 121
Location: Berlin, Germany
G2 patch files: 39

PostPosted: Tue Mar 28, 2006 11:02 am    Post subject: G2 Hard- & Software Internals Reply with quote  Mark this post and the followings unread

Starting from discussion over there, we might delve deep into the secrets...

http://electro-music.com/forum/topic-10638.html

Other topics related are welcome!

All the best,
/Marcus

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selvmarcus



Joined: Feb 08, 2006
Posts: 121
Location: Berlin, Germany
G2 patch files: 39

PostPosted: Wed Mar 29, 2006 9:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

To start discussion here, I did the following patch.

It shows that the internal busses are 20bit only, (including FX) while the normal, in-area signals have 24bit width.

Somebody had this already?

I ran over that while trying to encode three note values in one signal by shifting bits.

It´s also a kind of tutorial for binary arithmetic. Or rather a challenge, you decide. Smile

We can guess now for what the other 4 bits are being used...

/Marcus

Edit: It´s pretty confusing confusion at the moment. Sorry!
Seems I got the number representation wrong!
See new patch below.



Bus20bit_proofSM.pch2
 Description:
Testing bitwidth of internal busses and normal signals.

Download
 Filename:  Bus20bit_proofSM.pch2
 Filesize:  3.08 KB
 Downloaded:  533 Time(s)


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Last edited by selvmarcus on Thu Mar 30, 2006 3:38 pm; edited 1 time in total
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3phase



Joined: Jul 27, 2004
Posts: 1155
Location: Berlin
Audio files: 13
G2 patch files: 138

PostPosted: Wed Mar 29, 2006 11:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

no...thats new info...
some people wont be happy about this... I personaly care so much...but especially when using the busses for sequencer stuff it runs into the kind of problems you just have.
Its good when the instrument gets explored in such detail...
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selvmarcus



Joined: Feb 08, 2006
Posts: 121
Location: Berlin, Germany
G2 patch files: 39

PostPosted: Thu Mar 30, 2006 11:05 am    Post subject: Reply with quote  Mark this post and the followings unread

A look inside...

http://www.sequencer.de/clavia_synthesizer/clavia_g2_modular.html


Mabe this belongs to the Wish List:

Although I find it a clever design decision to use 24kHz for control signals,(where in computer music 500-1000
was thought to be enough some time ago) because this way the sampling frequency is above the hearing range
and you don´t to have filter it out or interpolate when doing amplitud mod ..., it´s also a waste for processing
slow resolution MIDI, note data, CC...

I would like to have another type of signal with ~3 kHz resolution.
Maybe another MIDI-area for this.

You could have 8 times more processing with the same DSP.

Really universal midi processing elements, filters, data sequence (incl.sysex trigger), ... maybe like that
MidiModular by Blue Hell I will have a look.

I will probably spend 160.- Euro for the MidiSolution event processor to help me with some of this.

And the interslot MIDI... this should be fixed and extended too.
In the meantime, it´s possible to do multibyte coding/mux over the busses, bandwidth is there, for
techniques see in the Building Blocks Section.


Any more info, somebody?

What are the exact Processor, RAM, ... specs?

4 Motorola 563... 150 MHz? Control Processor 40MHz?

/Marcus

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selvmarcus



Joined: Feb 08, 2006
Posts: 121
Location: Berlin, Germany
G2 patch files: 39

PostPosted: Thu Mar 30, 2006 4:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

I have to read the manual!
I have to read the manual!
I have to...

Sometimes it´s more fun to experiment.

Or dig this:

Fractional and Integer Arithmetic using the DSP56000 Family of General Purpose DSPs, Motorola APR3/D
http://www.soundart-hot.com/files/developer/pdf/motorola/APR3.pdf


Ah, now I see. 2 bit on bus are used to give some headroom for
summing from multiple senders. -12db pad setting may help.


/Marcus


numberbusSM.pch2
 Description:
Some experiments with number representation, DA/AD modules and busses

Download
 Filename:  numberbusSM.pch2
 Filesize:  1.57 KB
 Downloaded:  509 Time(s)


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jksuperstar



Joined: Aug 20, 2004
Posts: 2492
Location: Denver
Audio files: 1
G2 patch files: 18

PostPosted: Fri Mar 31, 2006 12:19 am    Post subject: Reply with quote  Mark this post and the followings unread

Control System:
1x Freescale ColdFire MCF5407 @ 162MHz (233 MIPS)
1x Philips 11818B USB1.1 Interface (parallel interface to ColdFire)
http://www.semiconductors.philips.com/pip/ISP1181.html

Audio System:
+/-5 volt (dual rail, not single supply)
2x CS4392K (2ch 192kHz/24bit DAC, 114db Range) http://www.cirrus.com/en/products/pro/detail/P224.html
2x CS5341CZ (2ch 96kHz/24bit ADC, 105db range) http://www.cirrus.com/en/products/pro/detail/P1029.html
LM833 (used in preamp for mic input, line in, and amp for DAC output
http://www.national.com/pf/LM/LM833.html

DSP System:
4x Motorola 56367 @ 150MHz
4x 256Kx16 SDRAM (10ns=100MHz)
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selvmarcus



Joined: Feb 08, 2006
Posts: 121
Location: Berlin, Germany
G2 patch files: 39

PostPosted: Fri Mar 31, 2006 7:55 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for this!

/Marcus

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