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  1. #1

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    Default WASAPI vs ASIO4ALL/Kernel Streaming

    Has anyone tried both WASAPI and ASIO4ALL/Kernel Streaming and noticed a difference? I switched from kernel streaming to WASAPI a few days ago, to make switching between my DAC (music) and AVR (movies) more simple while using JRiver, and I noticed a difference. I understand that they are both supposed to be bit-perfect, but I have been hearing a decrease in depth and slightly harsher high frequencies after switching over to WASAPI. I'm not sure if it's me or if either modes is doing something funny to the signal.

    I'm using Win7 64bit, JRiver MC17, Wyred 4 Sound DAC2 (thanks Neil!) connected by asynch USB, Intel Core i5-750, 4GB RAM. My settings in JRiver have the buffer size for both WASAPI and kernel streaming set to 0.50 seconds, DSP settings off, and play files from memory is enabled.
    Last edited by blehmbo; 09-15-2012 at 12:51 AM.

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    I will have to change mine and check it out. I am also using jriver, w4s dac2 via wasapi. I have never tried anything else but wasapi on it. So you are saying asio4 sounded better yes? Later on today I will change mine out and see I can tell the difference.

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    aso did sound different better to me

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    Quote Originally Posted by erniejade View Post
    So you are saying asio4 sounded better yes?
    Yes, ASIO4ALL sounded better to me than WASPI. ASIO4ALL is essentially a hack for kernel streaming if I remember correctly, so it should sound very similar if not identical to KS. Thanks for trying it out and sharing your findings. Are you connected through your sound card or USB?

    Has anyone else had a similar or different experience with the different output modes?

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    asynchronous usb from my laptop running Jriver to a w4s dac2. I am using legacy focus speakers and I head the differece right away. It was not subtle to me.

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    Quote Originally Posted by blehmbo View Post
    ...Wyred 4 Sound DAC2 (thanks Neil!)...
    You're welcome!

    But I must say, reading threads like this makes me love my Squeezebox Touch. I used to use a pc as my source, but fiddling with this type of stuff really got on my nerves...
    Good music, a good source, and good power can make SDA's sing. Tubes make them dance.

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    Last I remember ASIO was a wrapper and not necessarily bit-perfect, whereas WASAPI definitely is when setup correctly . . . could be mistaken though'.

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    I use ASIO4ALL and it sounds great. It also has A LOT to do with the recieving chip on the dac end. I could never get the WASAPI interphase to load without issues. Granted, I didn't try very long since I was happy with ASIO4ALL. Although ASIO4ALL freezes up frequently when I'm using the Audio GD NFB-3 with the Tenor receiving chip. With my Keces and the Burr Brown receiving chip, I don't have those issues. I use Media Monkey as the player.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

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    Quote Originally Posted by Shike View Post
    Last I remember ASIO was a wrapper and not necessarily bit-perfect, whereas WASAPI definitely is when setup correctly . . . could be mistaken though'.
    ASIO is bit perfect.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

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    I thought win 7 uses wasapi and xp used asio.

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    Quote Originally Posted by bikerboy View Post
    I thought win 7 uses wasapi and xp used asio.
    Nope, I use ASIO in Win 7 too.
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  12. #12

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    Quote Originally Posted by bikerboy View Post
    I thought win 7 uses wasapi and xp used asio.
    No. It's essentially a plug in type driver for whatever program you use as a music player to interphase with external hardware (ie; a dac). The both work on Windows 7, not sure if they are both backward compatible with XP.

    http://en.wikipedia.org/wiki/Audio_Stream_Input/Output

    WASAPI is a Windows application, which first appeared in VISTA, that can provide direct unmixed audio streams but while it seems to have more functions for multi channel audio, it's more complicated.

    http://en.wikipedia.org/wiki/Technic..._Windows_Vista
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

  13. #13

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    Quote Originally Posted by bikerboy View Post
    I thought win 7 uses wasapi and xp used asio.
    Actually in respect to when they appeared you are correct. ASIO was used in versions of Windows prior to VISTA. WASAPI was introduced in VISTA but both can be utilized on W7 and I assume W8, unless Microsoft has come up with something else for W8.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

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