RH1 transfer rates

[ojos504]

Hi !

I thought the RH1 was able to transfer to the PC at a 10X rate, but it took about 7 minutes to transfer about 20 minutes Linear PCM to the PC (XP SP3 / SS 4.3), that makes near 3X. No other MD unit was ever plugged into this PC, so I think it's not related with the known problem of SP mode... On the other hand, it took 4 min 1/2 to upload 1h 6min of Hi-SP recordings (Atrac 256), and that's not far from 15X.

So my question is: what performances should I expect from the RH1 ?

Thanks in advance.

[sfbp]

Maybe it's not USB 2.0 at the computer? Just a thought.

What you have to consider is the amount of data. The higher the recording rate, the less observed "xnn" transfer speed you will see. LP4 will transfer about 4 x as fast as SP, for example.

66 minutes of Hi-SP is about equivalent to about 66 * 256 / 1411 minutes of LPCM ie about 12 minutes.

So 20 minutes of LPCM should take about 4.5 * 20 / 12 = 7.5 minutes. Perfect agreement in fact between the two.

It takes me about 10 minutes to transfer a full MDLP disk, which is about x8 for SP, x16 for LP2 and x32 for LP4. Sounds like you see about the same as what I get.

[ojos504]

Maybe it's not USB 2.0 at the computer? Just a thought.

Sorry, I didn't tell USB is 2.0.

What you have to consider is the amount of data. The higher the recording rate, the less observed "xnn" transfer speed you will see.

Ok, this makes it more logical.

It takes me about 10 minutes to transfer a full MDLP disk, which is about x8 for SP, x16 for LP2 and x32 for LP4. Sounds like you see about the same as what I get.

OK, so the transfer rates I observed on my unit seem to be normal: ~x3 for LPCM, ~x15 for Hi-SP.

Looking at date/time of previous SP imports in SS4.3, I found a transfer time of about 8 min for 80 minutes music: quite similar to your results.

Thanks for the answer.

[sfbp]

OK, so the transfer rates I observed on my unit seem to be normal: ~x3 for LPCM, ~x15 for Hi-SP.

So there is a difference between MD and Hi-MD. If you notice, your 256kbps HiSP is x15, whereas SP is about x8 (some say x10). The sound data rates are around 10% difference, so MD appears slower than HiMD by quite a bit at the same **sound** data rate.

Again this is because the underlying data capacity of the disk has not really changed, just a better encoding in HiMD, more music on each disk thanks to PRML.

[ojos504]

So there is a difference between MD and Hi-MD. If you notice, your 256kbps HiSP is x15, whereas SP is about x8 (some say x10). The sound data rates are around 10% difference, so MD appears slower than HiMD by quite a bit at the same **sound** data rate.

Again this is because the underlying data capacity of the disk has not really changed, just a better encoding in HiMD, more music on each disk thanks to PRML.

Yes I did notice it, but had no explanation for it. Thanks.