Also we already a have a very good DSD tread so this tread will be a repeat .
I really don't follow people talking nonsense around hire. Bit is bit no matter if it's written in word or as a stream. DSD 64 bit stream is equal regarding data amount as PCM 176400 Hz 16 bit.
Same number of bits, different amount of information/entropy.Yes, it contains the same amount of entropy.
Right. DSD has higher entropy, making it hard to compress. High-rate PCM has a lot of empty "space" which compresses well.It wastes a lot of this with high frequency quantisation noise, so a good amount of that is useless
Same number of bits, different amount of information/entropy.
DSD has higher entropy, making it hard to compress. High-rate PCM has a lot of empty "space" which compresses well.
Did a test with 7zip. DSD took longer to compress and archive whose 6~12% bigger than wave one. Used 96/24 masters, converted to 176400/16 wave and from there to DSD. Still compression ratio didn't feel under 50% even for DSD. Still when it comes to transport and simplicity DSD is a right choice, for storage certainly not.Same number of bits, different amount of information/entropy.
Right. DSD has higher entropy, making it hard to compress. High-rate PCM has a lot of empty "space" which compresses well.
I disagree. DSD is a bad choice for any purpose.Still when it comes to transport and simplicity DSD is a right choice,
-af volume=4dB,aresample=resampler=soxr:precision=28:dither_method=lipshitz:dither_scale=0.5:cutoff=1 -ar 44100 -sample_fmt s16
I have quite a lot of hybrid SACDs (the format is very common with classical releases). I thought this one in particular sounded much better in DSD than when played as CD or as 16-bit 44.1 file:
View attachment 125784
It really does seem more alive, more real, just better! Anyway, out of curiosity I extracted the two channel DSD as a single Edit Master file from the disc (yes, it can be done) and converted it to 16-bit 44.1 kHz flac using ffmpeg with options*Code:-af volume=4dB,aresample=resampler=soxr:precision=28:dither_method=lipshitz:dither_scale=0.5:cutoff=1 -ar 44100 -sample_fmt s16
The resulting CD quality audio file sounds *identical* to the DSD! It also measures the same when checked vs a 24-bit 88.2 kHz version with dr14 tool, and the waveform looks very nearly identical too. Subjectively, the CD layer of the disc is mastered to play a little louder than the DSD layer but I'm not sure if there are any other differences. What I do know is that side by side I find the DSD and my conversion impossible to distinguish.
*I arrived at this set of parameters by reading the fine manual (more than once ), looking up how other people had approached the same task, and then by some trial and error. This conversion doesn't necessarily give a result from DSD that matches the CD layer of the same disc, but it does always result in a Red Book compliant file that cannot be audibly distinguished from that DSD layer....which is supposedly better!
I disagree. DSD is a bad choice for any purpose.
All the good ones are multi-level sigma-delta.Well, some Sigma-Delta DACs use 1-bit PDM, i.e. DSD internally (not necessarily "DSD64")
Is it not sometimes 5 level sigma delta some internal format that does not at all look like any consumer or pro format just something suitable for the inner workings of the chip ?All the good ones are multi-level sigma-delta.
Yes, you would not normally store data in that encoding, if you even have access to it. I'm aware of only a few chips that expose these signals externally.Is it not sometimes 5 level sigma delta some internal format that does not at all look like any consumer or pro format just something suitable for the inner workings of the chip ?
Yes, you would not normally store data in that encoding, if you even have access to it. I'm aware of only a few chips that expose these signals externally.
All the good ones are multi-level sigma-delta.
The top performers from AKM, Cirrus, ESS, and TI are all multi-level designs. Achieving comparable performance with a single-bit design would be very difficult if not impossible.I do not claim to know all DACs. Apparently you can ;-)