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DVD-Audiobahn New DVD-Audio music releases and talk about the latest players. |
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In Reply to: In general maybe, but I don't think so in this case posted by Dave Kingsland on August 19, 2004 at 19:31:56:
Dave, we will check it out. Only one possible reason in 49TXi to add such ultrasonics is switching to slow roll-of in digital filters DF1706. They work in software mode, therefore the modes are settled by DSP, I can't track such switching on the schematics. I didn't pay attention, was hi-bit/hi-sampling on or off in my measurements, as it was advertised for CDs, DVD-V (DD and DTS) - low resolution sources only. No one word about any improvement of sound for SACD or DVD-A ...
Here is the explanation of Audio Scaler, provided at Pioneer (Europe) website:
http://members.cox.net/alex_lat/images/Audio_scaler.PNG
But you had pointed to an interesting question. We didn't have the explanation for the line at 22kHz or 24 kHz, which is presented on almost all spectrums. We also know, that in advertised AX10Ai(59TXi) signals are processed in DSPs at 96kHz, that means - for the previous model 49TXi it could be 48kHz in all DSPs or partially in some of them (we have 2 SHARCs and Motorola DSP in it).
We need some additional measurements, and if they will confirm Dr. Gresinger's, yours and John's suggestions and measurements concerning 24/96 Steely Dan DVD-A and James Taylor SACD, that will be an idea for another article - Smoke and Mirrors in AV industry ...
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Follow Ups
- Re: In general maybe, but I don't think so in this case - Alex Striganov 10:40:41 08/23/04 (0)
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