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FILE CONVERSION AND UPSAMPLING
PCM TO DSD CONVERSION
Through use of our TruBit™ Upsampling technology as described below, it is now possible to convert
PCM files to DSD. For those that prefer DSD this is an extremely powerful feature. Imagine taking
any source or sample rate from network, internet, Bluetooth, AirPlay, or SPDIF and converting to
DSD64, 128 or 256. Whether you're in the PCM or DSD camp, The DMS-500/550/600
accommodates both! Not only can you convert any PCM sample rate up to 768 kHz in the PCM
domain, but TruBit™ Upsampling also allows you to convert that 16, 24 bit PCM to a 1 bit direct
stream digital signal with sample rates of 2.8224 MHz (64 or standard rate), 5.6448 MHz (128 or
Double rate), 11.2 MHz (256 or Quad rate). You can even up convert a native DSD64 file to a
higher level of DSD128 or DSD256. By using superior no compromise AKM DAC's, any native DSD or
PCM to DSD converted signal is processed as true DSD. In other words, The DMS-500/550/600
does NOT down convert a DSD signal to PCM within the DAC chips. This is actually somewhat rare
as many so called DSD players actually down convert the DSD signal to PCM inside the inferior DAC
chip(s) without you knowing it.
PCM AND DSD UPSAMPLING
TruBit™ Upsampling is a powerful upsampling technology used to upsample lower sample rates to
higher sample rate and increases the bit depth to 32 bits for PCM and 1 Bit for DSD in the digital
domain via a dedicated 128 bit DSP engine prior to analog conversion. This can be very useful in
achieving a more enjoyable listening experience. Once a native input signal is changed to a selected
higher sample rate, the bit depth will also automatically increase to 32 bits for PCM or change to 1
bit for DSD conversion. However, like all-powerful tools, this too should be used prudently. We do
not take a blanket "higher is better" approach to upsampling. It is important to experiment with
different rates depending on your source or source material. Many times a native rate might be
preferred whereas some recordings or files formats might benefit from a higher sampling rate, and
so on.
The available selectable sample rates depend on the input signals original sample rate. For
example, above 192 kHz the available PCM rate(s) will only be in multiples of either 44.1 kHz or 48
kHz as follows:
Input signal rates of 44.1 or multiples of:
BYPASS (44.1) ---> 48 ---> 88.2 ---> 96--> 176.4 ---> 192 ---> 352.8---> 705.6
---> DSD64 ---> DSD128 ---> DSD256.
Input signal rates of 48 or multiples of:
BYPASS (44.1) ---> 48 ---> 88.2 ---> 96--> 176.4 ---> 192 ---> 384--->768
---> DSD64 ---> DSD128 ---> DSD256.
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