Multiple Sample Rates in one DAW

[jamesp]

ASIO can only handle one interface at a time. You will need to use WDM drivers if you want to use multiple interfaces (or maybe ASIO for one and WDM for the other).

James.

[wado1942]

Sony Vegas can internally resample input tracks on the fly to whatever your session settings are, but the conversion isn't the greatest quality.

[jamesp]

Originally Posted by wado1942

Sony Vegas can internally resample input tracks on the fly to whatever your session settings are, but the conversion isn't the greatest quality.

Reaper can also do this and gives you the option of various conversion qualities but I'm not sure whether you can use your own SRC if you don't like what Reaper provides.

James.

[duke89061]

Thanks fellas -

I'm not looking for SRC, I'm looking for a DAW to actually run at multiple rates.

I'm looking to feed my analog chain at the native rate of the mixes, and capture at 44.1.

[Cellotron]

The DAW app I use - SAWStudio - Welcome to RML Labs - The Makers of SAWStudio - can load soundfiles with mixed sample rates into the same session and playback at any rate desired at the click of a mouse, or optionally playback any file at different set rate using a high quality real-time sample rate conversion algorithm.

It's also possible to open two (or more) instances of SAWStudio on a single DAW and tie each one of these to a different sound card that is not clocked to each other so that you can playback at one sample rate and capture back at a different one on the same DAW.

I in fact used a setup like this when I was using a single DAW for all my work at Europadisk 7 years ago - but at this point since a computer with more than enough heft to playback and optionally process a stereo file (or multitrack mixes for that matter) can be had for around all of $300 - for convenience, stability, work flow and power - it's just made way more sense to have separate computers for playback and capture at this point.

Best regards,
Steve Berson

[Dene]

Originally Posted by Cellotron

The DAW app I use - SAWStudio - Welcome to RML Labs - The Makers of SAWStudio - can load soundfiles with mixed sample rates into the same session and playback at any rate desired at the click of a mouse, or optionally playback any file at different set rate using a high quality real-time sample rate conversion algorithm.

It's also possible to open two (or more) instances of SAWStudio on a single DAW and tie each one of these to a different sound card that is not clocked to each other so that you can playback at one sample rate and capture back at a different one on the same DAW.

I in fact used a setup like this when I was using a single DAW for all my work at Europadisk 7 years ago - but at this point since a computer with more than enough heft to playback and optionally process a stereo file (or multitrack mixes for that matter) can be had for around all of $300 - for convenience, stability, work flow and power - it's just made way more sense to have separate computers for playback and capture at this point.

Best regards,
Steve Berson

SAW wow...haven't used that in years....
I can do something similar by pitching from an old version of Soundforge and capturing in a separate DAW. ASIO drivers seem to get in the way...I would bet that Core Audio would to (but there is probably a work around I don't know). It is easier to use a DSD recorder or a second computer I would bet.
If anyone knows a simpler way to do this I would love to know.

[Jerry Tubb]

My results from a couple of years ago on the Mac Pro:

Snow Leopard DAW tests

Best, JT

[paulo m]

Thanks fellas -

I'm not looking for SRC, I'm looking for a DAW to actually run at multiple rates.

I'm looking to feed my analog chain at the native rate of the mixes, and capture at 44.1.

In a DAW environment, what you´re asking always involves SRC. If you want to run your analogue chain at the native rate of the mixes as you say(via DA), you set your DAW sampling rate to match the sampling rate of your files on a per file sampling rate. Of course you can´t expect to record at a diferent Fs using the same DAW, without using SRC.

On the other turn, if you want to define a specific sampling rate to interface your analogue chain, choose that Fs and use a DAW that can playback files with a diferent Fs than the files it´s playing.

I use Pyramix, that can play clips on the timeline that have diferent Fs than the session´s Fs. It´s done in real time.

So, if I want to record the output of my analogue chain at 44.1 Khz, I set Pyramix to run at that Fs, place the CD alignment in the timeline, despite the FS of the diferent files and record the output of the analogue chain into some spare tracks.

At output of Pyramix, files are SRC´ed to the set Fs, outputed to the analogue chain via the converters and recorded back at set Fs.

Anyway, I prefer to run the session at a higher Fs, if using plugins and record to a recorder via analogue inputs, at 44.1 Khz if the target is CD release.

The other option is to use the same setup and SRC the processed files, according to the media they are intended to be distributed. This way, you´ll always have the mastered file at a higher Fs.

[Babaluma]

I believe I heard about someone doing this within the same DAW (using Samplitude), and two separate PCI cards on a single PC, a couple of years ago, but not sure where. AFAIK, the easiest way to do what you want is to buy another PC, use one as transfer to DAC, and one as capture from ADC, then you can set each SR to whatever you like, avoiding any SRC. I think quite a few people are working like this.

I just do all the mastering at the native SR, then SRC before limiting/dithering if needed, as I only have one PC.

[paulo m]

I just do all the mastering at the native SR, then SRC before limiting/dithering if needed, as I only have one PC.

Some limiters work better at higher sampling rates or even upsample internally.
If I have to SRC to a lower Fs, I do it after limiting and add dither if needed. It´s my last process in the chain.

[Babaluma]

It's swings and roundabouts. I've done it both ways, but SRC before limiting/dither tends to save me a lot of time and trouble. The trouble with SRC after limiting is that you run the risk of overs caused by the SRC process. If you SRC before limiting/dither, you don't have to worry about this.

Slightly different topic, but I'll often engage 4x oversampling in Elephant if working at 44.1 to make sure no ISPs get through, but this can also sometimes be detrimental compared to no oversampling, at least to my ears (more veiled high end).

[Jerry Tubb]

Originally Posted by Babaluma

AFAIK, the easiest way to do what you want is to buy another PC, use one as transfer to DAC, and one as capture from ADC, then you can set each SR to whatever you like, avoiding any SRC. I think quite a few people are working like this.

That's my current approach, two DAWs.

one to pitch at the native mix rate, the other to catch at the destination rate.

Maximum flexibility.

They're connected via gigabit Ethernet for various file transfers & uploads.

Allows one to keep working while he other is burning discs or processing.

Then a MacBook for running Plextools while the two DAWs are busy.

all the while talking with the attending clients, printing cue sheets, etc.

Multitasking.

Best, JT