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Date: Sun 27-Sep-1989 13:26:17 From: Unknown Subject: Reading a CD player's digital output I'm interested in connecting the digital output of a CD player (or, more specifically, a PCM recorder) to the digital input on a NeXT cube. Has anyone done this? Is any extra hardware required for converting the bitstream into something the digital input can take? How is the the cable wired? I'm planning on writing some software to deal with reading this input, and converting it to a .snd file. Has this already been done? On a similar note, where can I find literature describing the format of the digital bitstream from the CD player/PCM recorder? --- David Jedlinsky | The ideas expressed here do not necessarily Digital Equipment Corporation | reflect the views of of my employer. dcj@decvax.dec.com >From: chavez@sumex-aim.stanford.edu (R. Martin Chavez)
Date: Sun 28-Sep-1989 16:56:44 From: Unknown Subject: Re: Reading a CD player's digital output dcj@flume.ZK3.DEC.COM (Dave Jedlinsky OSEM) writes: ~I'm interested in connecting the digital output of a CD player (or, more ~specifically, a PCM recorder) to the digital input on a NeXT cube. What is the format of the digital input for the NeXT? If that port simply goes to the synchrounous serial input on the 56000, then things are easy if you also have a CD player that utilizes the Sony data separator chip (Sony and Denon players use it, at least). There is an app note from Motorola on how to insert a 56000 into the serial data stream of a Sony CD player. Note that you'll have to open up the CD player and AT LEAST do some tack soldering (one wire). If you use the digital out of the CD player, you'll have to get rid of all of the subcode information that's sent along for the ride. This means you'll have to do some programming for the 56000. However, I'll bet that someone already has an application built for the NeXT machine for just plugging the CD player in.
Date: Sun 30-Sep-1989 00:32:14 From: Unknown Subject: Re: Reading a CD player's digital output In <1989Sep28.165644.6764@ivucsb.sba.ca.us> Todd Day writes: >In article <5664@decvax.dec.com>, Dave Jedlinsky writes: >>I'm interested in connecting the digital output of a CD player (or, more >>specifically, a PCM recorder) to the digital input on a NeXT cube. > >What is the format of the digital input for the NeXT? If that port >simply goes to the synchrounous serial input on the 56000, then >things are easy if you also have a CD player that utilizes the >Sony data separator chip (Sony and Denon players use it, at least). >There is an app note from Motorola on how to insert a 56000 into >the serial data stream of a Sony CD player. Note that you'll have >to open up the CD player and AT LEAST do some tack soldering (one >wire). If you use the digital out of the CD player, you'll have >to get rid of all of the subcode information that's sent along >for the ride. This means you'll have to do some programming for >the 56000. However, I'll bet that someone already has an application >built for the NeXT machine for just plugging the CD player in. No, I haven't seen or heard of such an app; but it sounds like it is possible and would certainly be neat. If anyone does it and wants to distribute the schematics + source freely, please do so! There are also some third party products that will do what Dave wants: The Metaresearch "Digital Ears," Ariel's "DM-N Digital Microphone," and Singular Solutions "A/D64x Analog/Digital Interface." All allow recording 16 bit, 44.1 kHz stereo samples through the DSP port; the A/D64x also allows capturing data from the digital output of CD and DAT players. Ali Ozer, NeXT Developer Support Ali_Ozer@NeXT.com >From: phd_ivo@gsbacd.uchicago.edu
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