Hi Abaci, if the sample rate is correct and it is mono audio and there is not too much noise in the signal avmd should work. You may want to retry this after new changes have been merged into master branch today. I have verified avmd detects 1000Hz beep in the audio attached previously. You can send me the mobile number I can test in private email. cheers, Piotr On 21 March 2016 at 21:53, Abaci B <abaci64@gmail.com> wrote:
I didn't try with stereo 44100Hz, I tried simple g711 calls to Verizon cell phones and it didn't trigger the beep, when calling a voicemail on another freeswitch box it did detect the beep.
On Mon, Mar 21, 2016 at 9:27 AM, Piotr Gregor <piotrek.gregor@gmail.com> wrote:
Hi Abaci,
back to your problems with Verizon voicemail - the cause of them is:
1. Audio is stereo 2. Audio is sampled at 44100Hz 3. DESA algorithm used in avmd is very sensitive to noise
If you resample audio to 8000Hz and set avmd module to 8000Hz bit rate or leave it at 44100Hz but adjust avmd to 44100Hz while always properly handling number of channels (mono/stereo/...) then results are good. Avmd module in current form is unable to meet these requirements, but I am going to add the support for this.
cheers, Piotr
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