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<blockquote data-quote="orencha" data-source="post: 100097" data-attributes="member: 11329">To play a DTS-CD, the player (BASS or DSHOW) must play the PCM data &quot;bit-perfectly&quot;, meaning: no gain change, no re-sampling (must be 44.1kHz), no DSP at all! Additionally, from my experience (with two different SPDIF soundcards), the soundcard volume must be set to 100%, for both &quot;Master&quot; and &quot;Wave Out&quot;.The reason for that is that a DTS-CD is kind of &quot;tricky&quot;: it looks to every player as a &quot;regular&quot; CD (16bit PCM 2-channel 44.1Khz sampling rate). However, a DTS stream is encoded into the PCM frames; so an SPDIF-enabled CD player simply sends the PCM bits to the amplifier through SPDIF, and the amplifier recognize the stream as &quot;DTS&quot;. If you hear a DTS-CD without DTS-enabled amplifier you will hear noise. If you modify bits of the stream (such as changing gain), it will not be a valid DTS stream, and again - you'll hear noise.Unfortunately, I'm not aware of a simple way of identifying a specific CD as a DTS-CD, so even if we have a &quot;fallback&quot; option from BASS to DSHOW, it will probably not solve the problem.However, if we DO find a way to know a CD is a DTS-CD (such as, reading the first 1 second and looking for a DTS frame, which is, again, not simple), even BASS can go into &quot;bit-perfect mode&quot;, meaning: all DSPs are disabled for this CD, and the volume is set to 100% (to prevent changing bits in the stream). Note the player will also need to set the soundcard's WAVE and MASTER volumes to 100%.PS: the same problem exists with WAV files ripped from a DTS-CD. I have a few of those files, and I can only play them through MediaPortal if I:* Choose DSHOW as a player* Set soundcard MASTER volume to 100%* Set soundcard WAVE volume to 100%identifying those files as DTS may be easier to implement; we can simply give them a different file extension, such as &quot;.dts.wav&quot; or &quot;.dtswav&quot;. The player (BASS) can then go into &quot;bit-perfect&quot; mode, according to file extension.</blockquote>

[QUOTE="orencha, post: 100097, member: 11329"] To play a DTS-CD, the player (BASS or DSHOW) must play the PCM data "bit-perfectly", meaning: no gain change, no re-sampling (must be 44.1kHz), no DSP at all! Additionally, from my experience (with two different SPDIF soundcards), the soundcard volume must be set to 100%, for both "Master" and "Wave Out". The reason for that is that a DTS-CD is kind of "tricky": it looks to every player as a "regular" CD (16bit PCM 2-channel 44.1Khz sampling rate). However, a DTS stream is encoded into the PCM frames; so an SPDIF-enabled CD player simply sends the PCM bits to the amplifier through SPDIF, and the amplifier recognize the stream as "DTS". If you hear a DTS-CD without DTS-enabled amplifier you will hear noise. If you modify bits of the stream (such as changing gain), it will not be a valid DTS stream, and again - you'll hear noise. Unfortunately, I'm not aware of a simple way of identifying a specific CD as a DTS-CD, so even if we have a "fallback" option from BASS to DSHOW, it will probably not solve the problem. However, if we DO find a way to know a CD is a DTS-CD (such as, reading the first 1 second and looking for a DTS frame, which is, again, not simple), even BASS can go into "bit-perfect mode", meaning: all DSPs are disabled for this CD, and the volume is set to 100% (to prevent changing bits in the stream). Note the player will also need to set the soundcard's WAVE and MASTER volumes to 100%. PS: the same problem exists with WAV files ripped from a DTS-CD. I have a few of those files, and I can only play them through MediaPortal if I: * Choose DSHOW as a player * Set soundcard MASTER volume to 100% * Set soundcard WAVE volume to 100% identifying those files as DTS may be easier to implement; we can simply give them a different file extension, such as ".dts.wav" or ".dtswav". The player (BASS) can then go into "bit-perfect" mode, according to file extension. [/QUOTE]

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