[sdiy] Minimoog schemos and few questions about I2S...

[mikko.a.helin at nokia.com]

Hei,

It's possible to use I2S ADC only with so called "APSLive" drivers (search
with google). The usual SB Live ADC is the one inside AC97 CODEC, not
Philips part. There is Philips DAC for the rear channels out which is much
better than the AC97 codec but no ADC. I think the (Emu) APS use the same
pins as the AC97 codec interface for I2S ADC/DAC interface. However, if you
want to use the SB Live software (as there are no APS drivers for Win2000)
then you should build ADC + S/PDIF transmitter. Elektor Electronics have
such PCB available for Crystal CS5396 (CS5394 will work also) and CS8404 (I
think CS8402 will work <= 48 kHz). 

-Mikko

> -----Original Message-----
> From: ext Matti Leino [mailto:mle at nic.fi]
> Sent: 30. November 2001 16:35
> To: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] Minimoog schemos and few questions about I2S...
> 
> 
> Hi there!
> 
> So, now I'm bothering you with few questions, again...:
> 
> My friend want's me to build him a retro-minimoog, just like 
> it was. So now 
> I would love to have schematics for it. I have few schemos, 
> like filter, 
> but he want's as close original as possible. I couldn't find, 
> I tryied 
> hyperreal and synthfool and google, but no results so far...
> 
> And then questions about I2S. I have SB Live! in my PC, but I'm not 
> satisfied with quality of it's line inputs. I heard, it uses 
> Philips ADC, 
> which aren't good in quality. Signal is clipping in something like 
> -6...-3dB level. That's not good. I have checked 
> configuration in n-track, 
> but nothing to do. I also use little program in Linux, what me and my 
> friend wrote, but all the same. Now I want to make ADC, which 
> converts 
> analog signal from my mixer, to I2S, which I could feed directly into 
> Live's on-board connector. Has anyone tryied this? I checked, 
> Crystal has 
> few nice ADC's, +5V supply, 48kHz sample rate, serial output 
> (I2S). There's 
> few models, 18-bit, and 20-bit. I have designed the circuit, 
> but of course 
> it would be nice to compare schemos, if someone has done this before.
> 
> Thanks in advance!
> 
> -Matti
> 
> 
> 
> 
> 
> Matti Leino                     email:matti.leino at ee.tpu.fi
> Sammonkatu 32A14                email:mle at nic.fi
> 33540 Tampere           http://www.tpu.fi/~t0mleino
> Finland                 gsm:+358407076540
>