Guest Anonymous Posted February 3, 2003 Report Share Posted February 3, 2003 I was looking through the MZN1 service manual (Thanks to whoever sourced it an put it on this board!), and came across something interesting on IC 801 (DSP/System controller/DRAM) chip. Pin 194 is the "Audio Data Output Terminal" Although not used on this model, the IC design engineers wouldn't really be bothered about Sony politics and corporate strategy, and would have included such a feature. In fact it wouldn't be something they would have had to actually think about building into the system, it is an internal process which would have been extended to the outside world via pin 194. If I was designing the chip, thats exactly what I'd do. If the data from this pin could be buffered and passed through an LED mounted at the tip of the MIC socket, This data could be output from the MIC socket via optical lead to a PC. The MIC input would still be able to be used for recording, and no drilling of the case would be necessary. All that would be needed is a small PC application to convert the data into a WAV file, unless the data is in SPDIF format where software already exists. Now, I still have 10 months guarantee left on my MZN1, so I am not going to start modifying it, but I may buy a used older model that I can get a service manual for and try the concept out. Hopefully someone else will give it a try first, or maybe just point out a major flaw in my reasoning! Lets have a discussion! Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted February 3, 2003 Report Share Posted February 3, 2003 On the MZR90 the DADT signal is on IC502 pin 42, and this directly feeds into a separate D/A A/D chip. So It looks like it can be done by modifying any MD to output this signal. Quote Link to comment Share on other sites More sharing options...
stackedsax Posted February 20, 2003 Report Share Posted February 20, 2003 If this actually works, please keep me posted! It would be such a relief to finally take a digital out from these MD's. You have my full support in this project. -SS Quote Link to comment Share on other sites More sharing options...
Mystyler Posted February 21, 2003 Report Share Posted February 21, 2003 Sony is like that. If you look on the R900 PCB, you'll see an USB terminal...:twisted: Quote Link to comment Share on other sites More sharing options...
highlandsun Posted March 8, 2003 Report Share Posted March 8, 2003 You still need to do some experimenting/research before you can make this work. DACs come in a variety of flavors, and generally use a raw data format, not the same as S/PDIF data format. If it's raw 16 bit stereo, or raw 24 bit stereo, you will need some extra hardware and logic to get this into a computer's digital audio input port. Generally you may be able to find data sheets for Sony's DACs, so this bit of research shouldn't be too hard. By the way, IC301 is the ADC, part # AK5354, a Google search turns up the data sheet for this part easily enough. It can output digital data in one of two formats. The reason this is interesting to someone hacking a digital output, is you would generally expect that the ADC and DAC in a system both use identical data format. In this case, you have your choice of raw 20-bit words left-justified in a 32-bit per sample data stream, or I2S format. This still doesn't answer for certain what the data format of IC801's DADT output is. The other thing to do here is to look at the components used in previous models; generally the designers will continue to use the same approach over and over again. Find a model that used a discrete DAC, find its data sheet, see what digital formats it accepts. Most likely the DADT output of IC801 will be the same as this. Quote Link to comment Share on other sites More sharing options...
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