lee@pipe.cs.wisc.edu (Soo Lee) (06/01/91)
I am interested in the idea of using DSP port to capture CD player output in digital form since it is obvious that biphase-mark-code from CD player is not compatible to famous RS-422(aka, RS-232) format. I'd love to put CD music into NeXT and use them as an unique startup signal whenever corresponding application is launched. Also I'd like to take an advantage from DSP port built in NeXT. As far as the copy protection is concerned, I hope that copying music from CD player to NeXT is OK since it is purely personal. Since music can be used as a signal to a certain event with nice, natural interface thru ears, I think it is definitely help some compterized rehabiltation programs without bulky tape recorders. I think no one can work on such device without resolving copy protection issue with recoding company commercially. Hence I am not expecting such a device on the market soon. Now here is my question. If I do build some interface, purely signal level converter for digital signal between DSP port and CD player is requred, and I think it could be solved under $5.00 circuit. However I am facing problems of start and stop of a music from the coding sequence coming out from CD player. Furthermore I doubt whether DSP input port can handle 3 Mbits/sec signals in practice. I'd love to hear from who've done with DSP port for signal processing in *real* time. Since I haven't been exposed digital audio processing, I'd love to hear more detailed specifications about coding/decoding of CD digital out signal from who have done with AES/EBU specifications too! I will appreciate any pointers, suggestions and comments. Soo lee@cs.wisc.edu --------------------------------------------------------------------- Disclaimer: The opinions expressed herin is my opinion and nothing is relevant to any other person, institution, organization or subject. ---------------------------------------------------------------------