QRQcw
VIRTUAL AUDIO DEVICE - VB-AUDIO VIRTUAL CABLE
This VB-AUDIO VIRTUAL CABLE worked extremely well during my tests with FLDIGI and MUMBLE. It never glitched or crashed during a - 2 day - 24/7 test - with the FLdigi morse code audio tone output sending CW(from a repeating text file) using the VB-AUDIO VIRTUAL CABLE to connect to the MUMBLE input.
Very easy to setup and use.
- Here are a few screenshots of my setup -
FLdigi - VB-Audio Virtual Cable -
is selected as the FLdigi Playback soundcard
Select VB-Audio Virtual Cable for the MUMBLE INPUT
All audio travels over this VB-AUDIO VIRTUAL CABLE just like a sound card - from FLDIGI right over to the MUMBLE INPUT. In order to hear FLdigi yourself, however, you will have to use an audio repeater application to grab the VB-AUDIO and send it to your normal sound card. I have used several applications for this and all of them are free software and do a good job.
SOUND TAP(bySM5VXC)
Chuck aa0hw
NEW VERSION OF VOICEMEETER WITH IMPROVEMENTS
Voicemeeter 1.0.0.8 is available now on www.voicemeeter.com
This last Voicemeeter version (1.0.0.8) fixes different bugs (mostly due to WASAPI Exclusive mode instability) and brings 2 new functions:
-1- ‘mono’ switch (L+R) on both physical inputs, useful to people using audio devices providing signal on a single channel (even for stereo device). This is typically the case when connecting mono microphone to audio pro devices (usually handled by ASIO driver) providing regular stereo recording device for each couple of i/o.
-2- System Settings Delay options to “synchronize” output A1 and A2. Output A1 is the main output of the audio engine and is usually in advance compared to Output A2. If you want to improve monitoring synchronization, you have to introduce a delay on Output A1 (e.g. 25ms). This can now be done in the System Settings Dialog Box.
However, this synchronization is usually not precise enough to connect 2 speaker system together without getting in air some “comb effect” like flange, chorus etc… You might be aware that both audio devices (A1 and A2), especially when implemented on 2 different audio boards, are playing audio according different clocks (with different time drift). So while one can play sound at 44103 Hz the other can do it as 44089 Hz and these values are changing in the time and producing different hearable strange effects…
Voicemeeter 1.0.0.8 should let you take advantage of WASAPI Exclusive mode, bringing better sound quality and smaller latency on last Windows Operating Systems (VISTA, WIN7, WIN8 32/64 bits).
www.voicemeeter.com / www.vb-cable.com
Sep 9, 2013
Chuck aa0hw
New VoiceMeeter version has excellent low latency performance with dahdidah cw keyer
Using Daddidah cw keyer with these settings:
the measured latency from a paddle handle TAP TEST was about 12 milliseconds...this is excellent low latency performance from dahdidah using its WDM DRIVER for the VoiceMeeter vaio virtual sound card; also observed was excellent 45 wpm dit stream cw timing - while holding down the dit paddle, and listening to the steadiness of the timing of the rapid succession of dits....very steady...and again , very good performance from dahdidah
here is a picture of the cw key paddle handle test result
NOTE: CLICK ON PICTURE for full size view
Here is the VoiceMeeter mixer in action with dahdidah sending a dit stream
NOTE: click on picture for full size view
Sep 9, 2013
Chuck aa0hw
FURTHER IMPROVEMENTS TO VOICEMEETER new version out 9-14-2013
Voicemeeter 1.0.0.9 at last… www.voicemeeter.com
Again we had to compile a new version to fixe latest WASAPI bugs...
We have found so many issues in WASAPI (Windows Audio Session API) that we have made a kind of classification to describe them. It’s now sure that WASAPI Exclusive mode is not stable by design and can produce different types of bugs appearing even after hours of well working audio streaming:
-AUDIO BUG: Audio Stream might stop, even after hours, we can suddenly get pop and cracks and/or no more sound (application needs to be restarted). A single audio client can stop to send buffer and we can lose an input for example after 4 hours streaming (Audio Session needs to be restarted)…
-SYSTEM SEVERE: Application can crash or be frozen randomly (without any user action).
-SYSTEM CRITICAL: Entire System can freeze and then needs hard reboot. In some configuration we even got BSOD (Blue Screen Of Death).
Now we hope Voicemeeter 1.0.0.9 works around all these problems and let you finally take advantage of WASAPI Exclusive mode (bringing better sound quality and smaller latency) on last Windows Operating Systems (VISTA, WIN7, WIN8 32/64 bits).
Otherwise we recommend to use MME driver instead of WDM (begining by one input - it seems WDM outputs are totally reliable).
Sep 14, 2013