Jump to content
IGNORED

Automatic Output Sample Rates in Mac OSX ?


Recommended Posts

Excuse me if this has been answered before.

 

I've seen that I can change the digital output sample rate in OSX via the audio/midi panel. Is there a way of having the output stream automatically follow the original sample rate of the file that's playing in iTunes ?

 

Sorry, if I'm not being clear, but as I understand it if you have mostly 44.1/16 files and have the audio/midi settings at this value, when a file that is, say, 96/24 is played it gets downconverted. (I'm using an airport express, the question is moot at the moment, but I intend to connect my mac directly to the dac shortly).

 

Is this where an interface like the Lynx comes in ?, if so is there a USB or firewire attached product that will do what I'm looking for ?

 

Thanks

 

Peter

 

Asus Netbook -> Fidelity DA-150 > Chevron Audio Paradox > Avondale S-100 > Audium Comp 5

Link to comment
Share on other sites

What is going on?

 

In any case, am I missing something? If you don't like software OR DAC upsampling/downsampling: even if such a feature WAS available in itunes and the bit rate of the audio stream from itunes WAS passed through, don't you then need a DAC that autosenses this input and can switch between sensing this input automatically? Otherwise if you want pure unsampled sound, your going to have to do this manually on the DAC....or is there a DAC already available that autosenses the digital input ??

 

New simplified setup: STEREO- Primary listening Area: Cullen Circuits Mod ZP90> Benchmark DAC1>RotelRKB250 Power amp>KEF Q Series. Secondary listening areas: 1/ QNAP 119P II(running MinimServer)>UPnP>Linn Majik DSI>Linn Majik 140's. 2/ (Source awaiting)>Invicta DAC>RotelRKB2100 Power amp>Rega's. Tertiary multiroom areas: Same QNAP>SMB>Sonos>Various. MULTICHANNEL- MacMini>A+(Standalone mode)>Exasound e28 >5.1 analog out>Yamaha Avantage Receiver>Pre-outs>Linn Chakra power amps>Linn Katan front and sides. Linn Trikan Centre. Velodyne SPL1000 Ultra

Link to comment
Share on other sites

I have a Beresford DAC and it autosenses the input rate, I thought that all DACs did this. I suppose that may not be true.

 

So Chris, how long do we have to wait, you keep telling us there's something coming, is it software, hardware, carrier pigeon ...,

 

what ?

cheers

 

Peter

 

Asus Netbook -> Fidelity DA-150 > Chevron Audio Paradox > Avondale S-100 > Audium Comp 5

Link to comment
Share on other sites

Chris,

 

Any computer dac senses the change in sample rate. This is a requirement of any dac. If the rates are available in Audio Midi then they are available to any application.

 

The problem is the same on Vista as it is on OSX that everything is resampled to the output specified in either Audio Midi or on Vista the Control Pane for the device.

 

On the MAC side you can change this if you "HOG" the output stream in CoreAudio then you have control over that device and can do as you like. When you exit it is the applications responsibility to return the sample rate to the one set in Audio Midi. If this is not done then the next time Audio Midi is launched that rate will be the same as the last track played in the application.

 

On the PC side it needs too use Exclusive mode and the user is required to "allow" the device to be used that way and the application again as above will change the rate depending on the track.

 

Thanks

Gordon

 

Link to comment
Share on other sites

  • 2 years later...

Water Damage - The Most Helpful Restoration Service in America - Affordable Services in Your Area - 24/7 Hotline.

 

Long Distance Movers - Long Distance Movers Since 1995 - GET A QUOTE. New York (NYC), California (CA), Los Angeles (LA) & San Francisco.

 

Hyundai Starter - Shop for Hyundai Starter from Car Parts Warehouse at wholesale price online. Visit Car Parts Warehouse to buy premier quality replacement car and truck parts for all makes and models.

 

Honda CD Changer - Car Radio Pros carries only the best, strictly OEM car radio parts. Every part will sell is guaranteed to fit and comes with a full one year warranty. Learn more about the parts we carry

 

 

Link to comment
Share on other sites

  • 2 months later...

I found this old thread and wondered if the original question was answered. I too would like to find a way to have the Audio Midi program automatically adjust to the sample rate/bit width of the source material, especially for my DTS encoded files, which will only play through to my receiver (which does indeed autosense the sample rate of the source) when Audio Midi is set to 44.1/16. I understand that this can be set manually, but my goal is to have a single music library of mixed sample rates (including the DTS files) and simply play them without having to reset Audio Midi every time I want to play a DTS file (or reset it to a higher resolution setting for the other files). Gordon,your response may answer my question, but I may need a bit of clarification.

 

Mac Mini 2010/2.4GHz/8GB RAM/120GB SSD[br]HiFace USB/Coax adapter[br]Drobo 4x2TB media storage[br]Denon 3808ci receiver (used as pre/pro)[br]Oppo BDP-83 universal BD/DVD/CD player[br]JVC DLA-HD250 projector[br]Rotel RMB-1095/RB-1080 power amps[br]VPI HW-19 Mk IV/SME 309/ATML150/SDS/SAMA turntable assembly[br]Quad 44 preamp ( with MM and MC phono modules)[br]Dynaudio Audience center/surround/rear speakers[br]Dynaudio Aries F/R speakers[br]NHT 1259/Rythmik Audio 12\" subwoofer[br]

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share



×
×
  • Create New...