I would like to be able to cut lacquers from a DSD source with lathe automation. This requires four channels. Two channels feed the automation and the other two channels feed the cutterhead. The Modulation signal that feeds the cutterhead needs to be delayed by either 1200ms or 800ms depending on the record speed.
For PCM I just take four channels from my DAW. I don't have a multichannel DSD workstation. There are plenty of two channel DSD playback devices.
Mini DSP sells the MCH Streamer which can stream eight channels of DSD. I asked MiniDSP and they said there wasn't enough memory to delay the stream.
What could be used to delay the DSD stream to give me the Modulation signal?
For PCM I just take four channels from my DAW. I don't have a multichannel DSD workstation. There are plenty of two channel DSD playback devices.
Mini DSP sells the MCH Streamer which can stream eight channels of DSD. I asked MiniDSP and they said there wasn't enough memory to delay the stream.
What could be used to delay the DSD stream to give me the Modulation signal?
A RAM chip and a couple of counters, if it is in raw DSD format. When it is DoP, you need some extra shift registers and glue logic to change DoP into raw DSD. Is it strictly DSD64 or different rates?
I don’t have a lot of experience with DSD. I’ve been trying to figure out how to do this without getting a Pyramix or a Sonoma. I’m not exactly sure what format the MCH Streamer outputs. The manual just says DSD. The manual said it can handle Native DSD in DSD64, DSD128 and DSD256. It can handle DoP at DSD64 and DSD128. I also don’t know how that would connect to a DAC. I’ve seen DSD over coaxial SDIF-2 interface.
Section 2.5.6 of the user manual describes what I referred to as a raw DSD output, so it can output raw DSD.
What kind of DAC do you intend to use for DSD and does it also have a raw DSD input? For your information, there are several DIY DAC designs with raw DSD input on the digital line subforum.
I haven't gotten that far yet. First I'd like to figure out if it's possible. I'll save being picky for later. I have just about zero experience with building digital electronics. I'll check out the DIY DAC's. It would be a good excuse to learn smt soldering. I only do through hole now. I just got an Analog Discovery 2 so I think I'll be able to look at the data streams with the logic probes.
I guess the sticking point is the delay line. For someone who knows what they are doing how long would it take to make a delay line? Hours, days, weeks, months? I think I could probably afford hours and days. But not weeks and months.
Regarding the DAC threads, there are these:
The Best DAC is no DAC
Signalyst DSC1
Valve DAC from Linear Audio volume 13
I'll get back to you about the delay line.
The Best DAC is no DAC
Signalyst DSC1
Valve DAC from Linear Audio volume 13
I'll get back to you about the delay line.
Thanks. I looked through the sticky and the offerings from Twisted Pear look popular. Getting something assembled and tested that all I have to do is add a PSU, controls and a case would be ideal. I have a long list of to do's. The mechanical metalworking part is no problem for me.
I was thinking about using Sound It! Pro for playback. The software an MCH Streamer and the lower end Twisted Pair DAC would come in a bit over $500USD which is a very nice price.
I was thinking about using Sound It! Pro for playback. The software an MCH Streamer and the lower end Twisted Pair DAC would come in a bit over $500USD which is a very nice price.
I looked at possible memory chips for your application. Most of them nowadays come in various kinds of ball grid array packages that are impossible to solder with a soldering iron. Some types come in 48-pin TSOP packages, SMD packages with 0.5 mm pitch that are difficult but not impossible to solder with a soldering iron, for example this fast SRAM: https://nl.mouser.com/ProductDetail/ISSI/IS61WV204816BLL-10TLI/?qs=cttFivMKqWz%2BDMMKFLCg1w==
I think you would need one of those and about a dozen standard logic chips, like counters, flip-flops and gates, that you can usually get in SO packages with 14 or 16 pins in 1.27 mm pitch.
If the prospect of soldering 0.5 mm pitch components doesn't scare you off, I can come up with a schematic - strictly at your risk, of course.
I think you would need one of those and about a dozen standard logic chips, like counters, flip-flops and gates, that you can usually get in SO packages with 14 or 16 pins in 1.27 mm pitch.
If the prospect of soldering 0.5 mm pitch components doesn't scare you off, I can come up with a schematic - strictly at your risk, of course.
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This project is way above my pay grade. I would have to hire it out. I think I will start out just getting the playback going without a DDL first. Assuming I can get that to work I could then put out a help wanted sign. I don't see getting to this for a little while. I have a very large project I'm trying to finish. I just ran across the MCH Streamer and the wheels started turning. I thought I would investigate. Thanks for your help.
Another solution, one that I know absolutely nothing about, might be a circular buffer in software between your normal software and the interface to the MCH Streamer. There are people on the PC Based subforum (among other places) who know a lot about computer software and how to insert extra signal processing, maybe they can help.