On Aug 10, 2021, at 11:40 AM, Sam - KO4HBY <samuel.najjar@...> wrote:

Hi Brian,

I set the audio device to "pulse pulse" in the direwolf config.? Then, I turned off the onboard device in the pulse config.? That way, Alsa doesn't take over the device.

?

-Sam KO4HBY

Sam,

I changed the config to "ADEVICE pulse pulse”. ?Direwolf shows up in PulseAudio volume control again. ?No change to Direwolf’s performance. ?I can still transmit packets but Direwolf is not reading any input from the radio. ?Also FLDIGI, WSJTX, and JS8Call are still functional.

I assume turning off the onboard device is the Built-in Audio under the CONFIGURATION tab? ?Here are the PulseAudio settings.

PLAYBACK

-System Sounds -OFF

-ALSA plug-in [direwolf]: ALSA Playback on, PCM 2901 Audio Codec Analog Stereo -ON

RECORDING

-ALSA plug-in [direwolf]: ALSA Capture from, PCM 2901 Audio Codec Analog Stereo -ON

OUTPUT DEVICES

Built-in Audio Digital Stereo -OFF

Built-in Audio Analog Stereo -OFF

PCM2901 Audio Codec Analog Stereo -ON

INPUT DEVICES

Monitor of Built-in Audio Digital Stereo -OFF

Monitor of Built-in Audio Analog Stereo -OFF

Monitor of PCM2901 Audio CODEC Analog Stereo -ON

PCM2901 Audio Codec Analog Stereo - ON

CONFIGURATION

Built-in Audio, Profile: OFF

Built-in Audio, Profile: OFF

PCM2901 Audio Codec, Analog Stereo Duplex

Brian Blanchard

brian.j.blanchard@...

Callsign KJ7RNY

On Aug 10, 2021, at 11:40 AM, Sam - KO4HBY <samuel.najjar@...> wrote:

Hi Brian,

I set the audio device to "pulse pulse" in the direwolf config.? Then, I turned off the onboard device in the pulse config.? That way, Alsa doesn't take over the device.

?

-Sam KO4HBY

On Aug 25, 2021, at 8:26 AM, David Ranch <direwolf-groupsio@...> wrote:

Hello Brian,

Just to make sure, when the rig is set to 144.390 MHz, it is connected to my Pi, and I am running Direwolf, I should begin seeing packets on the terminal window as they are received on the rig, correct??

Assuming you've configured DIrewolf properly... yes.? Can you share your direwolf.conf file?

It seems odd that Direwolf is detecting audio but no packets are decoding on the terminal window.

That all depends if it's the "right audio from the radio" and the audio levels are correct.

20.b Identify and test the USB soundcard

pi@raspberrypi:~ $ sudo lsusb -vv | grep -e Audio -e tSamFreq | grep -v -e Descriptor -e bInterfaceClass

can't get debug descriptor: Resource temporarily unavailable

It's strange to see these "can't get debug descriptor: Resource temporarily unavailable" lines.? I wonder if something else is trying to take over your soundcard.? I've seen PulseAudio do quirky things like this before.

Bus 001 Device 008: ID 08bb:2901 Texas Instruments PCM2901 Audio Codec

What sound card is this?

? idProduct????????? 0x2901 PCM2901 Audio Codec

? iProduct??????????????? 2 USB Audio CODEC

[snip]

??????? tSamFreq[ 0]??????? 16000

can't get device qualifier: Resource temporarily unavailable

can't get debug descriptor: Resource temporarily unavailable

can't get debug descriptor: Resource temporarily unavailable

can't get debug descriptor: Resource temporarily unavailable

can't get device qualifier: Resource temporarily unavailable

can't get debug descriptor: Resource temporarily unavailable

??????? tSamFreq[ 0]??????? 16000

More of the same... that can't be good.

?

pi@raspberrypi:~ $ arecord -D plughw:2,0 -t wav -f S16_LE -r 48000 -d 10 /tmp/test.wav

Recording WAVE '/tmp/test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

**recorded 10 seconds of FM radio**

?

pi@raspberrypi:~ $ aplay --device=hw:1,0 /tmp/test.wav

Playing WAVE '/tmp/test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

**audio plays in headphones**

WHy are you using two different devices here?? Usually, you will specify the SAME hardware device for both recording and playback duties.? I'm assuming you're using a different playback device to more easily hear the captured audio.? Assuming you really intend to use two different devices, how did the played audio "sound"?? Assuming your radio was tuned to 144.390, were the heard 1200bps AFSK packets clear, non-distorted, etc?? An example sound clip is here:

??

You should hear similar packet sounds with some background levels of hiss, some packets will be louder or softer (remote stations not properly setting their deviation right), etc. but you need to make sure you're actually hearing the right audio.? If your not, you're getting audio from the WRONG source.

pi@raspberrypi:~ $ aplay --device=hw:1,0 /usr/share/sounds/alsa/Front_Center.wav

Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

**headphone audio plays “Front Center”**

Ok.. can you do the same playback but send it towards the Radio and can you confirm by connecting a speaker to the pins that should normally go into the radio that the audio is making it there as expected?

20.d Soundcard Mixer settings

pi@raspberrypi:~ $ arecord -D plughw:2,0 -t wav -f S16_LE -r 48000 - | \aplay -D plughw:1,0 -

Recording WAVE '-' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

Playing WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

^CAborted by signal Interrupt...

Aborted by signal Interrupt...

**plays FM radio, connected rig via USB to Pi, headphones plugged into Pi**

?

**setting input device in alsamixer allows PLAYBACK volume control**

**pressing F4 for CAPTURE displays THIS SOUND DEVICE DOES NOT HAVE ANY CAPTURE CONTROLS**

What soundcard is this?? I've seen some sound devices that have physical input level knobs on the front of them will not offer any electronic mixer level settings.

?

20.e. Confirm Clean Silence from the Soundcard

**turned USB AF Output Level on rig to 0.**

pi@raspberrypi:~ $ arecord -D plughw:2,0 -t wav -f S16_LE -r 48000 -d 15 /tmp/15sec-silence.wav

Recording WAVE '/tmp/15sec-silence.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

pi@raspberrypi:~ $ aplay --device=hw:1,0 /tmp/15sec-silence.wav

Playing WAVE '/tmp/15sec-silence.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

**nothing but dead silence**

Ok.. hopefully this is a good result.

20.f – Setting the right audio levels for AFSK packet tones

**Followed URL

Were you able to monitor your transmitted packets from your radio and confirm they sounded ok?

--David
KI6ZHD

David,

Thank you so much with the help debugging my issues. ?The Noise Reduction feature of my radio was ON. ?I turned it OFF and now direwolf is working great! ?I believe my problems are solved.

In response to some of your questions (if it helps)…

-config file, I can share if it helps but it is set up correctly I believe

-“right audio from the radio” and audio levels **This was the issue**

-Not sure about the weird errors “can’t get debug […]

-Sound card. ?I am using the internal sound card of the Icom IC705

-Two different audio devices. ?Since the problem was audio input to the Pi I listened on headphones.

Brian Blanchard

(336) 682-1046

Work (480) 338-8760

brian.j.blanchard@...

Callsign KJ7RNY

On Aug 25, 2021, at 8:26 AM, David Ranch <direwolf-groupsio@...> wrote:

Hello Brian,

Just to make sure, when the rig is set to 144.390 MHz, it is connected to my Pi, and I am running Direwolf, I should begin seeing packets on the terminal window as they are received on the rig, correct??

Assuming you've configured DIrewolf properly... yes.? Can you share your direwolf.conf file?

It seems odd that Direwolf is detecting audio but no packets are decoding on the terminal window.

That all depends if it's the "right audio from the radio" and the audio levels are correct.

20.b Identify and test the USB soundcard

pi@raspberrypi:~ $ sudo lsusb -vv | grep -e Audio -e tSamFreq | grep -v -e Descriptor -e bInterfaceClass

can't get debug descriptor: Resource temporarily unavailable

It's strange to see these "can't get debug descriptor: Resource temporarily unavailable" lines.? I wonder if something else is trying to take over your soundcard.? I've seen PulseAudio do quirky things like this before.

Bus 001 Device 008: ID 08bb:2901 Texas Instruments PCM2901 Audio Codec

What sound card is this?

? idProduct????????? 0x2901 PCM2901 Audio Codec

? iProduct??????????????? 2 USB Audio CODEC

[snip]

??????? tSamFreq[ 0]??????? 16000

can't get device qualifier: Resource temporarily unavailable

can't get debug descriptor: Resource temporarily unavailable

can't get debug descriptor: Resource temporarily unavailable

can't get debug descriptor: Resource temporarily unavailable

can't get device qualifier: Resource temporarily unavailable

can't get debug descriptor: Resource temporarily unavailable

??????? tSamFreq[ 0]??????? 16000

More of the same... that can't be good.

?

pi@raspberrypi:~ $ arecord -D plughw:2,0 -t wav -f S16_LE -r 48000 -d 10 /tmp/test.wav

Recording WAVE '/tmp/test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

**recorded 10 seconds of FM radio**

?

pi@raspberrypi:~ $ aplay --device=hw:1,0 /tmp/test.wav

Playing WAVE '/tmp/test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

**audio plays in headphones**

WHy are you using two different devices here?? Usually, you will specify the SAME hardware device for both recording and playback duties.? I'm assuming you're using a different playback device to more easily hear the captured audio.? Assuming you really intend to use two different devices, how did the played audio "sound"?? Assuming your radio was tuned to 144.390, were the heard 1200bps AFSK packets clear, non-distorted, etc?? An example sound clip is here:

??

You should hear similar packet sounds with some background levels of hiss, some packets will be louder or softer (remote stations not properly setting their deviation right), etc. but you need to make sure you're actually hearing the right audio.? If your not, you're getting audio from the WRONG source.

pi@raspberrypi:~ $ aplay --device=hw:1,0 /usr/share/sounds/alsa/Front_Center.wav

Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

**headphone audio plays “Front Center”**

Ok.. can you do the same playback but send it towards the Radio and can you confirm by connecting a speaker to the pins that should normally go into the radio that the audio is making it there as expected?

20.d Soundcard Mixer settings

pi@raspberrypi:~ $ arecord -D plughw:2,0 -t wav -f S16_LE -r 48000 - | \aplay -D plughw:1,0 -

Recording WAVE '-' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

Playing WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

^CAborted by signal Interrupt...

Aborted by signal Interrupt...

**plays FM radio, connected rig via USB to Pi, headphones plugged into Pi**

?

**setting input device in alsamixer allows PLAYBACK volume control**

**pressing F4 for CAPTURE displays THIS SOUND DEVICE DOES NOT HAVE ANY CAPTURE CONTROLS**

What soundcard is this?? I've seen some sound devices that have physical input level knobs on the front of them will not offer any electronic mixer level settings.

?

20.e. Confirm Clean Silence from the Soundcard

**turned USB AF Output Level on rig to 0.**

pi@raspberrypi:~ $ arecord -D plughw:2,0 -t wav -f S16_LE -r 48000 -d 15 /tmp/15sec-silence.wav

Recording WAVE '/tmp/15sec-silence.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

pi@raspberrypi:~ $ aplay --device=hw:1,0 /tmp/15sec-silence.wav

Playing WAVE '/tmp/15sec-silence.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

**nothing but dead silence**

Ok.. hopefully this is a good result.

20.f – Setting the right audio levels for AFSK packet tones

**Followed URL

Were you able to monitor your transmitted packets from your radio and confirm they sounded ok?

--David
KI6ZHD