Recording with Windows Wasapi

[Kalle_in_Sweden]

Hi
I have a problem with Audacity 2.06 and recording with Windows Wasapi
I am using a M-Audio Delta AP192 sound card
The problem is that I can only select Line 1/2 ( loopback) as recording device with Wasapi.
And means that a new recording track will record the playback sound from previous recorded tracks.
If I use MME or Windows Directsound the loopback text will not come up and the playback sound will not be recorded.
I have up till now been using Audacity 2.04 and WDM_KS without this problem.
If I disable Overdub the recording will not start!
Is this a known problem with Windows Wasapi ?
BR
Kalle_in_Sweden

[Kalle_in_Sweden]

Hi
I a think I found the explanation for this problem:
"Windows WASAPI: This host only appears on Windows Vista, Windows 7 and Windows 8.
The only recording devices that are currently provided are "loopback" devices for recording computer playback."
This makes Windows Wasapi more or less useless for normal recording work.
I will continue to use Audacity 2.4 with WDM-KS until this problem is solved..
/Kalle

[DVDdoug]

WASAPI only works in the loopback mode to record "what you hear" from the computer speakers.

If I use MME or Windows Directsound the loopback text will not come up and the playback sound will not be recorded.

What are you trying to do?

Normally if you want to record a new track "over" a "backing track", you'd record the new track while playing-back and monitoring the backing track.

Then, you'd mix later when you can adjust the relative levels of each track in the mix.

[steve]

And means that a new recording track will record the playback sound from previous recorded tracks.

If I use MME or Windows Directsound the loopback text will not come up and the playback sound will not be recorded.

Do those two statements contradict each other?
You seem to be complaining that one records what is playing on the computer, and also complaining that the other one doesn't record what is playing on the computer
What are you trying to record?

[Kalle_in_Sweden]

Hi
When I do a multitrack recording I want hear/playback the sound from the previous recorded tracks, but I dont want to record that sound on a new track ( only recording the sound from input , mic / instrument etc).
It is only when I do the final mix of all tracks, I want to combine the sound / levels /effects from all tracks.
This is how Audacity works with MME, Directsound and WDM-KS , but not with Wasapi.
/Kalle

[waxcylinder]

It is looking like that in the next release of Audacity that we may enable the inputs other than loopback for WASAPI.

WC

[steve]

This is how Audacity works with MME, Directsound and WDM-KS , but not with Wasapi.

That's because the only part of WASAPI that is implemented in Audacity 2.0.6 is the "loopback" input. The "loopback" input is a special "virtual" input and is similar in function to the old "stereo mix" on many XP machines.

So why can't you use MME or DirectSound? What does WDM-KS in Audacity 2.0.4 give you that is not available in 2.0.6?

[Gale Andrews]

It is looking like that in the next release of Audacity that we may enable the inputs other than loopback for WASAPI.

If we do, there may be bugs in recording from real inputs under WASAPI, and loopback recording behaviour may change on some machines. That's why we have not released WASAPI non-loopback hitherto.

We do also hope to re-enable WDM-KS but definitely not for 2.1.0.


Gale

[Gale Andrews]

This is how Audacity works with MME, Directsound and WDM-KS , but not with Wasapi.

That's because the only part of WASAPI that is implemented in Audacity 2.0.6 is the "loopback" input. The "loopback" input is a special "virtual" input and is similar in function to the old "stereo mix" on many XP machines.

So why can't you use MME or DirectSound? What does WDM-KS in Audacity 2.0.4 give you that is not available in 2.0.6?

If the sound card works with WDM-KS without crashing or freezing the computer when Audacity starts, WDM-KS offers latencies almost as low as ASIO, and offers 24-bit recording.

WASAPI also offers 24-bit recording, but latencies are not so low as with WDM-KS.


Gale

[Kalle_in_Sweden]

Hi
The funny thing is that WDM-KS (audacity 2.04) only gives a sligthly reduced "latency" compared to DirectSound (202 ms compared to 230 ms).
Audacity 2.06 gives a latency of 160 ms with MME and 230 ms with DirectSound ??
Wasapi gives a latency around 30ms
/Kalle