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  1. #1
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    By-passing SB Touch DAC?

    The main reason I bought the SB Touch was to use it as a music server for my Flac and AIFF high-res audio files. However, when I use the S/PDIF digital out from the Touch and feed the signal into my headphone/DAC unit I am underwhelmed by the audio quality. It's far below audiophile standards. Compared to using my FiiO X5 Gen II, the Touch is about half as good in terms of sound quality. So, my question is can I completely by-pass the Touch's DAC and only use it's digital line out, the same as the X5 allows? This would allow me to process a purifier signal through my separate, and much higher quality DAC.

  2. #2
    Senior Member iPhone's Avatar
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    Quote Originally Posted by output555 View Post
    However, when I use the S/PDIF digital out from the Touch and feed the signal into my headphone/DAC unit I am underwhelmed by the audio quality. It's far below audiophile standards.....
    So, my question is can I completely by-pass the Touch's DAC and only use it's digital line out, the same as the X5 allows? This would allow me to process a purifier signal through my separate, and much higher quality DAC.
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    This post doesn't make sense, you ARE by-passing the Touch DAC when you use the SB Touch's S/Pdif out or the Optical Out directly to an outboard DAC. Did you mean you were using the analog RCA Right/Left out to your headphone amp?

    So if you ARE using either the S/Pdif or Optical Out on the Touch and its doesn't sound as good as the other way you were listening, you have to have a bad cable as the Touch DAC would completely be by-passed and sound quality should be identical as the DAC is receiving the EXACT same digital file from the Server and is dependent on the Outboard DAC which is the same for both setups. So what you should have in either case is the exact same digital file (comes from you server) and the exact same DAC (it's being feed digitally) into the exact same Headphone amp, so it is impossible for them to sound different unless there is a bad interconnect because no matter what device is feeding digital files to the DAC plays no part as the input is the same digital file which remains unaffected while in the digital domain. Make sure you are using an actual 75 ohm Digital S/Pdif cable and not a 50 ohm mono-RCA cable from the Touch out to the DAC's S/Pdif input.
    iPhone
    Media Room:
    ModWright Platinum Signature Transporter, VTL TL-6.5 Signature Pre-Amp, Ayre MX-R Mono's, VeraStarr 6.4SE 6-channel Amp, Vandersteen Speakers: Quatro Wood Mains, VCC-5 Reference Center, four VSM-1 Signatures, Video: Runco RS 900 CineWide AutoScope 2.35:1, Vandersteen V2W Subwoofer

    Living Room:
    Transporter, ADCOM GTP-870HD, Cinepro 3K6SE III Gold, Vandersteen Model 3A Signature, Two 2Wq subs, VCC-2, Two VSM-1

    Office: Touch with Vandersteen VSM-1s
    Kitchen: Touch in-wall mount w/ Thiel Powerpoint 1.2s
    Bedroom: Squeezebox BOOM
    Bathroom: Squeezebox Radio
    Around the House: SliMP3, SB1, SB2, SB3
    Ford Thunderbird: SB Touch, USB drive
    Ford Expedition: SB Touch, USB drive

  3. #3
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    Indeed.

    Though also make sure the touch has not been configured to use bitrate limiting in LMS as your music will be compressed to accommodate, and note that the digital out would only be "bit perfect" if the SBT volume control is set to 100%.

    But assuming you are configuring the SBT to just pass unmodified bits then the sound quality is dictated by your offload DAC.

    Sent from my ONEPLUS A3003 using Tapatalk
    --
    Hardware: 3x Touch, 1x Radio, 2x Receivers, 1 HP Microserver NAS with Debian+LMS 7.9.0
    Music: ~1300 CDs, as 450 GB of 16/44k FLACs. No less than 3x 24/44k albums..

  4. #4
    Senior Member Mnyb's Avatar
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    Buy a raspi using the Touch as a music server is a dead end it barely works .

    Yes OP intends to use Touch as the server to not only as player .
    --------------------------------------------------------------------
    Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 MeridianG98DH 2 x MeridianDSP5200 MeridianDSP5200HC 2 xMeridianDSP3100 +Rel Stadium 3 sub.
    Bedroom/Office: Boom
    Kitchen: Touch + powered Fostex PM0.4
    Misc use: Radio (with battery)
    iPad1 with iPengHD & SqueezePad
    (spares Touch, SB3, reciever ,controller )
    server HP proliant micro server N36L with ClearOS Linux

    http://people.xiph.org/~xiphmont/demo/neil-young.html

  5. #5
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    Yeah, I wouldn't use the SBT as a server myself. Though it does work, if you have plenty of patience.
    --
    Hardware: 3x Touch, 1x Radio, 2x Receivers, 1 HP Microserver NAS with Debian+LMS 7.9.0
    Music: ~1300 CDs, as 450 GB of 16/44k FLACs. No less than 3x 24/44k albums..

  6. #6
    Senior Member Julf's Avatar
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    Quote Originally Posted by output555 View Post
    The main reason I bought the SB Touch was to use it as a music server for my Flac and AIFF high-res audio files.
    As others have pointed out, the Touch was never intended as a server - the server functionality was an afterthought and a crude extra. It is a great streamer, so use it as such, and use any old PC, laptop, NAS or raspberry pi as a server.
    "To try to judge the real from the false will always be hard. In this fast-growing art of 'high fidelity' the quackery will bear a solid gilt edge that will fool many people" - Paul W Klipsch, 1953

  7. #7
    Senior Member Mnyb's Avatar
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    AIFF hires migth need some transcoding that the onboard server on Touch can't handle .

    Native aiff and alac above 16/44.1 had some bugs in the past ? , better let a real LMS server turn those to hirez flac with its transcoding
    --------------------------------------------------------------------
    Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 MeridianG98DH 2 x MeridianDSP5200 MeridianDSP5200HC 2 xMeridianDSP3100 +Rel Stadium 3 sub.
    Bedroom/Office: Boom
    Kitchen: Touch + powered Fostex PM0.4
    Misc use: Radio (with battery)
    iPad1 with iPengHD & SqueezePad
    (spares Touch, SB3, reciever ,controller )
    server HP proliant micro server N36L with ClearOS Linux

    http://people.xiph.org/~xiphmont/demo/neil-young.html

  8. #8
    Senior Member iPhone's Avatar
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    Quote Originally Posted by output555 View Post
    The main reason I bought the SB Touch was to use it as a music server for my Flac and AIFF high-res audio files.
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    Quick note on a simple Server Idea. First there is the R-Pi (Raspberry Pi) option and second one can use Vortexbox 2.3 ( www.vortexbox.org ) with just about any old laptop, PC, or NAS that has a motherboard or Vortexbox 2.4 with newer 64 bit machines or leftovers. Vortexbox 2.4 with only run on 64 bit machines. I have an Intel NUC (4 by 4 by 2 inch NUC with a 2TB drive running Vortexbox 2.4) that works great. Low power consumption very small footprint.
    iPhone
    Media Room:
    ModWright Platinum Signature Transporter, VTL TL-6.5 Signature Pre-Amp, Ayre MX-R Mono's, VeraStarr 6.4SE 6-channel Amp, Vandersteen Speakers: Quatro Wood Mains, VCC-5 Reference Center, four VSM-1 Signatures, Video: Runco RS 900 CineWide AutoScope 2.35:1, Vandersteen V2W Subwoofer

    Living Room:
    Transporter, ADCOM GTP-870HD, Cinepro 3K6SE III Gold, Vandersteen Model 3A Signature, Two 2Wq subs, VCC-2, Two VSM-1

    Office: Touch with Vandersteen VSM-1s
    Kitchen: Touch in-wall mount w/ Thiel Powerpoint 1.2s
    Bedroom: Squeezebox BOOM
    Bathroom: Squeezebox Radio
    Around the House: SliMP3, SB1, SB2, SB3
    Ford Thunderbird: SB Touch, USB drive
    Ford Expedition: SB Touch, USB drive

  9. #9
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    OP is absent. Was this a UDP question?

    Sent from my ONEPLUS A3003 using Tapatalk
    --
    Hardware: 3x Touch, 1x Radio, 2x Receivers, 1 HP Microserver NAS with Debian+LMS 7.9.0
    Music: ~1300 CDs, as 450 GB of 16/44k FLACs. No less than 3x 24/44k albums..

  10. #10
    Senior Member iPhone's Avatar
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    Quote Originally Posted by drmatt View Post
    OP is absent. Was this a UDP question?

    Sent from my ONEPLUS A3003 using Tapatalk
    .
    .
    I should have looked at the OP first before posting for I didn't notice it was his first post. Hope I (we) didn't run him off as we are actually here to help!
    iPhone
    Media Room:
    ModWright Platinum Signature Transporter, VTL TL-6.5 Signature Pre-Amp, Ayre MX-R Mono's, VeraStarr 6.4SE 6-channel Amp, Vandersteen Speakers: Quatro Wood Mains, VCC-5 Reference Center, four VSM-1 Signatures, Video: Runco RS 900 CineWide AutoScope 2.35:1, Vandersteen V2W Subwoofer

    Living Room:
    Transporter, ADCOM GTP-870HD, Cinepro 3K6SE III Gold, Vandersteen Model 3A Signature, Two 2Wq subs, VCC-2, Two VSM-1

    Office: Touch with Vandersteen VSM-1s
    Kitchen: Touch in-wall mount w/ Thiel Powerpoint 1.2s
    Bedroom: Squeezebox BOOM
    Bathroom: Squeezebox Radio
    Around the House: SliMP3, SB1, SB2, SB3
    Ford Thunderbird: SB Touch, USB drive
    Ford Expedition: SB Touch, USB drive

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