I too have recently become a fan of WASAPI. When it was first
introduced I couldn't get it to work, possibly due to a dodgy internal
sound card. When using it with the ZED-10 USB mixer I can set a much
lower latency number than with Windows Direct Sound. When testing and
retesting with a click track, as suggested in the manual, results are
remarkably good. So far I haven't noticed variation, although the
manual does warn that it can occur.
Andrew
On 10/02/2016 10:29 PM, Robert Hänggi wrote:
I always use Wasapi as host:
Firstly, it has less latency and therefore less variance too.
Secondly, it can record at 24 bit instead of only 16 bit as per MME or WDS.
Thirdly, The recording level is independent and doesn't change when I
regulate my computer volume. It's therefore only a matter of turning
the mixer's gain knob to achieve the right level.
There might be some disadvantages though, depends on the used sound
card. I have to set the audio buffer to zero in order to hear a whole
selection on playback - otherwise it will be truncated.
Also, other sample rates than 44.1 kHz could cause jumps while
recording, and the Audacity project settings have to match with those
of the sound control panel.
Let me know how you're getting on. I've also written a "Latency Info"
plug-in. You could e.g. test the deviation for several recordings.
Robert
2016-02-10 11:18 GMT+01:00, Vitor Ferreira <vitorflash@xxxxxxxxxx>:
My host at the moment is the default MME, and i'm using my mixer as anThe audacity4blind web site is at
USB sound card, running the latest version of Audacity. Do you think
changing host might better deal with this? Thank you.
Às 04:35 de 10/02/2016, Robert Hänggi escreveu:
Hi Vitor--
Don't touch the 32 bit float setting, you'll run into clipping
problems while editing, I'm pretty sure.
However, you can test it of course but I doubt that the latency
variations are much influenced by this.
It's another thing with the sample rate. I use the normal 44.1 kHz.
Anything above (e.g. 96 kHz) gives a doubled CPU load.
Which host do you use for recording?
2016-02-09 20:30 GMT+01:00, Vitor Ferreira <vitorflash@xxxxxxxxxx>:
Hi David, or anyone hwo can give me some help.The audacity4blind web site is at
I could rich a decent level of latency correction in my Behringer USB
external sound card using Audacity and recording audio tracks, but
ocasionally, even using the same recording setup, values tend not to
suit sometimes. There's a slight anoying lac of sync between some of the
tracks. When i record the same track again, i can have it right in it's
place, sounding perfectly in sync, but sometimes that just doesn't
happen and i have to rerecord the track even without changing the
latency correction. I'm using windows 10, and have a good amount of ram
memory in my machine, about 8 gb, so memory shouldn't be a problem up to
a reasonable number of tracks. What do you think i should do to make
shure that the values of latency correction i have setup will always
work? Do you think that changing from 32 bit float to 16 bit can help?
Thank you very much.
--
Vitor Ferreira
Página pessoal: www.serramar.org
Skype: vitorvv10
Twitter: @vferre00
TLM: 916007791
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Vitor Ferreira
Página pessoal: www.serramar.org
Skype: vitorvv10
Twitter: @vferre00
TLM: 916007791
The audacity4blind web site is at
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