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  1. Squarewaves from DACs

    Based on request here, I made some more square wave scope measurements using a high resolution scope for comparison with earlier measurements of DSC1.




    Here are 7 kHz square wave results for the DSC1.

    DSD128:
    square7k-dsd128.png

    DSD256:
    square7k-dsd256.png

    DSD512:
    square7k-dsd512.png




    Here are 7 kHz square wave results for the iFi iDSD Micro. ...
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  2. Apple TV as a poor-man's Sonos system

    by , 12-27-2014 at 06:35 PM (The Ill-Tempered Audiophool)
    There are (at least) three ways one can use an Apple TV to play music:

    (1) Airplay streaming from a computer, iPod, iPhone, etc. This works in pretty much the same way as airplay to an Airport Express, or some airplay-enabled speakers like the Zeppelin Air. The streaming is done close to real-time, with a player application (like iTunes, or the player software on an iPhone) controlling it. (Recent versions of OS X with the right hardware can do this from the operating system level, ...
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  3. An absolute beginner's guide to seting up computer audio on Apple OS X, Part II

    by , 12-21-2014 at 04:07 PM (The Ill-Tempered Audiophool)
    Quote Originally Posted by Ajax View Post
    Hi Bill,

    Well done on your blog, which I thought was concise and easy to follow. I've recently completed an iTunes instruction guide for friends and have included a couple of items below that you may or may not think are worth including in your blog. It would be nice if we could have all this in one place so please feel free to cut and paste as you see fit.


    USING AN EXTERNAL HARD DRIVE TO STORE YOUR MUSIC

    Many Laptops (and some older desktops)
    ...
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  4. Absolute beginner's guide to using Apple's OS X for computer audio, the easy way

    by , 12-18-2014 at 04:25 PM (The Ill-Tempered Audiophool)
    screen-shot-2014-12-18-2.04.23-pm.png

    Introduction

    There is a lot of mythology surrounding computer audio. This is too bad, because it is very simple to do. Take a look around any community college campus; almost every student is using computer audio without any fanfare, either directly via their iPhone (or iPod), via their computer, or via some sort of streaming service to an iPhone or computer. They don't really have to do anything in terms of preparation.
    ...

    Updated 12-19-2014 at 01:16 PM by wgscott

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    Personal Blogs , computer , tweaks
  5. Recommendation < $1000 DAC - very good recommendation

    Quote Originally Posted by trappy View Post
    Quote Originally Posted by Boris75 View Post
    +1. I previously used a Hegel HD10 and was very pleased with it, so much that I kept it rather than selling it when I upgraded to a Benchmark DAC2. It has been in a box since then, as I wait for an opportunity to set up a second system where I would use it.
    Hegel makes great products in general, and they're a little under-appreciated outside of Europe. The HD11 is very good but its successor the HD12 is fantastic and a fantastic value, albeit at $1400 + tax a little more than your
    ...
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  6. Changing sample rate from 192/24 to 96/24

    Quote Originally Posted by bdiament View Post
    Hi zebb,

    Most (but not all) of the sample rate conversion algorithms I've listened to tend to brighten and harden the sound, anywhere from just a little bit to quite appreciably. The most transparent sample rate conversion I've yet heard is marketed by iZotope (Alexey Lukin's "64-bit SRC"). It can be had for a reasonable price in Audiofile Engineering's wonderful batch processor Sample Manager.

    Might be worth trying a demo to see what you think.
    Hope
    ...
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  7. Lossless Streaming Services

    Large Music Libraries vs Streaming Services

    A lot of us “Computer Audiophiles” have amassed huge libraries of music, either from our legacy CD library or from online vendors, such as HDTracks or some mixture of the two. So much music that it’s sobering to think we may not ever get a chance to listen to it all.

    This reminds me of one of my favourite writers, Colin Wilson who wrote a book about his own favourite books, called ‘The Books in My Life’’. He’d amassed a large ...
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  8. Audirvana + 2.0

    I have been a problem hearing some song cutting when only I play songs with sample rate above 96k (96k is ok).
    I'm using A+ 2.0.4 with M2tech Young DAC 384k , MacBook Pro 13inch Early 2011, 8GB, SSD drive, external Thunderbolt drive, and USB Hi-Speed Bus exclusive to feed DAC, and settings is:
    Hog Mode, Interger mode, no upsampling , 32bit
    I realize when a limit A+ to 24bit for playing above 96k the problem dissapier but I supposed the Interger Mode too, because INT flag turn ...

    Updated 11-02-2014 at 02:05 PM by mgaluzzi

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  9. iFi iDSD Micro measurements

    Here are my standard set of measurements, this time with iFi iDSD Micro.




    First sweep 0 - 22.05 kHz. Source is 44.1 kHz 32-bit PCM file.

    Filter "Bitperfect" (NOS):
    idsdmicro-sweep-wide-bp.png

    Filter "Standard":
    idsdmicro-sweep-wide-std.png

    Filter "Minimum(phase)":
    idsdmicro-sweep-wide-mp.png

    Upsampled to 768/24 PCM in HQPlayer:
    idsdmicro-sweep-wide-768k.png ...
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  10. Audirvana + 2.0 broken library after upgrade to iTunes 12.0.1

    Quote Originally Posted by mkrzych View Post
    Hello,
    After I did upgrade to the iTunes latest one - 12.0.1, A+ 2.02 messed up my whole library and smart playlists! I didn't have iTunes library synchronized, but I have some folders from the iTunes catalogue added the the selective syncing. A+ messed everything and when I clicked remove all iTunes playlists it's been busy for 1h and left all the things from iTunes - like audiobooks, everything even after clicking that remove iTunes playlist button. Man, what the f….. :-(
    ...
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  11. Puddletag on OS X

    by , 10-16-2014 at 01:33 PM (The Ill-Tempered Audiophool)
    Puddletag was developed for Linux, but it is easily ported to OS X. I made a fink package that enables you to install it automatically. If you have fink installed, simply issue the command

    Code:
    fink selfupdate
    fink -y install puddletag
    and Bob's your uncle.

    If you don't have fink installed, you can get a copy of mine, which will put everything in /sw, and an AppleScript launcher app I made in /Applications/Puddletag.app

    To do that, ...
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  12. More DSC1 measurement results

    As requested by Superdad, here are sweep results for a 0 - 768 kHz sweep (source is 1536/32 PCM).

    DSD128:
    ws-dsd128.png

    DSD256:
    ws-dsd256.png

    DSD512:
    ws-dsd512.png

    Note that corner frequency of the analog filter formed by the conversion stage moves up as the sampling rate is increased, while the Sallen-Key filter has static corner frequency.



    ...
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  13. Preliminary measurement results for the DSC1 DAC

    I finally used couple of days to do small fixes for the first unit I put together and got first decent measurement results.

    Results are still considered preliminary, because the DAC was measured without any shielding case, plain boards and transformers on a table, connected with open unshielded wire hassle...

    I performed my usual set of measurements.




    First was 0 - 22.05 kHz linear frequency sweep (44.1 kHz 32-bit PCM source file) with ...
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  14. Audirvana + 2.0

    Quote Originally Posted by mkrzych View Post
    Why when I quit and open A+ 2.0 it needs to scan the whole library again and again and it takes few minutes where the CPU is busted on over 100%? It is quite annoying, so I think scanning process need a real treatment and improvements.

    BTW, I have noticed on my DAC that after stoping playing in the A+, after few minutes time to time the LED on my DAC indicating the LOCK starts quickly blinking and I can hear cracking in my speakers. Then it stops and happening again. When I resume
    ...
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  15. New album from Marcin Wasilewski Trio

    Quote Originally Posted by mkrzych View Post
    Spark Of Life - Joakim Milder, Marcin Wasilewski Trio. Recommended!

    Spark Of Life | HDtracks - The World's Greatest-Sounding Music Downloads
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    Audacity shots - original high resolution recording with perfect graphs. Sounds superb and might be 2014 release.

    screen-shot-2014-10-10-09.20.59.png
    screen-shot-2014-10-10-09.20.41.png
    screen-shot-2014-10-10-09.20.35.png
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