Audio adjustment DVS


David k7iou
 

Hello, we are stumped where to adjust the audio, (DMR to analog).
It’s great coming from the analog repeater side to DMR but from DMR to analog it’s in the dirt and needs to be raised. We are connecting the Clear node to the EchoLink on the repeater system and don’t want to adjust EL on the repeater because it’s balanced correctly.

Also we are all reeling from the recent passing 12/16 of one of our (leaders, father to many) hams in the group who helped set this up and we did his last call on the system last night.

I’m not on site so I’d have to relay the information and help them walk through the adjustment.

It would be greatly appreciated if you could display step by step because we are still learning-dummies…..

Regards de David k7iou

MMDVM_Bridge and Analog_Bridge 
ClearNode software distribution. We are currently supporting DMR, P25, System Fusion YFS Reflectors, FCS Rooms and NXDN Reflectors. 


Steve N4IRS
 

/opt/Analog_Bridge/Analog_Bridge.ini

[USRP]
usrpAudio = AUDIO_UNITY                 ; Digital -> Analog (AUDIO_UNITY, AUDIO_USE_GAIN, AUDIO_USE_AGC)
usrpGain = 1.10                         ; Gain factor when usrpAudio = AUDIO_USE_GAIN (0.0 to 5.0) (1.0 = AUDIO_UNITY)
usrpAGC = -20,10,100                    ; Set the agc threshold (db), slope (db) and decay (ms)

tlvAudio = AUDIO_UNITY                  ; Analog -> Digital (AUDIO_UNITY, AUDIO_USE_GAIN, AUDIO_BPF)
tlvGain = 0.35                          ; Gain factor when tlvAudio = AUDIO_USE_GAIN (0.0 to 5.0) (1.0 = AUDIO_UNITY)


On 12/18/21 12:33 PM, David k7iou wrote:
Hello, we are stumped where to adjust the audio, (DMR to analog).
It’s great coming from the analog repeater side to DMR but from DMR to analog it’s in the dirt and needs to be raised. We are connecting the Clear node to the EchoLink on the repeater system and don’t want to adjust EL on the repeater because it’s balanced correctly.

Also we are all reeling from the recent passing 12/16 of one of our (leaders, father to many) hams in the group who helped set this up and we did his last call on the system last night.

I’m not on site so I’d have to relay the information and help them walk through the adjustment.

It would be greatly appreciated if you could display step by step because we are still learning-dummies…..

Regards de David k7iou

 MMDVM_Bridge and Analog_Bridge 
ClearNode software distribution. We are currently supporting DMR, P25, System Fusion YFS Reflectors, FCS Rooms and NXDN Reflectors. 


nh6bf
 
Edited

On my Clearnode, the Analog-Bridge.ini file already has AUDIO_USE_GAIN in both sections.  Being familiar with the setup, I get the DMR audio just fine... But...on occasions I do get breaks in the audio or no audio.  So, not sure what is going on...  Also, the CN has fail safe backups, so if you mess up some ini files, it writes it back to default...Smart Guy!!!


Steve N4IRS
 

usrpGain = 1.10                         ; Gain factor when usrpAudio = AUDIO_USE_GAIN (0.0 to 5.0) (1.0 = AUDIO_UNITY)

On 12/19/21 10:52 AM, nh6bf via groups.io wrote:
On my Clearnode, the Analog-Bridge.ini file already has AUDIO_USE_GAIN in both sections.  Being familiar with the WD7F setup, I get the DMR audio just fine... But...on occasions I do get breaks in the audio or no audio.  So, not sure what is going on...  Also, the CN has fail safe backups, so if you mess up some ini files, it writes it back to default...Smart Guy!!!


David k7iou
 
Edited

Hi Steve, this is what he sees when he ssh into CN.
/opt/Analog_Bridge/Analog_Bridge.ini
and it looks like this now:  

[USRP]
address = 127.0.0.1                     ; IP address of USRP partner (Allstar/Asterisk or another Analog_Bridge)
txPort = 32001                          ; Transmit USRP frames on this port
rxPort = 34001                          ; Listen for USRP frames on this port
usrpAudio = AUDIO_USE_GAIN                 ; Digital -> Analog (AUDIO_UNITY, AUDIO_USE_GAIN, AUDIO_USE_AGC)
usrpGain = 1.0                         ; Gain factor when usrpAudio = AUDIO_USE_GAIN (0.0 to 5.0) (1.0 = AUDIO_UNITY)
usrpAgc = -20,10,100                    ; Set the agc threshold (db), slope (db) and decay (ms)
tlvAudio = AUDIO_USE_GAIN                  ; Analog -> Digital (AUDIO_UNITY, AUDIO_USE_GAIN, AUDIO_BPF)
tlvGain = 1.0                          ; Gain factor when tlvAudio = AUDIO_USE_GAIN (0.0 to 5.0) (1.0 = AUDIO_UNITY)

 

can you highlight the actual adjustment so we can perform an increase of 3 dB change? He knows how to change and write the file.
Thanks and regards de k7iou 


David k7iou
 

We would need to change where circled?
thanks


Steve N4IRS
 

Yes, read the comments.

On 12/20/21 3:48 PM, David k7iou wrote:
We would need to change where circled?
thanks


David k7iou
 

Figured out what you meant by comments, (….) in the code. Lol
set gain DMR —->analog usrpGain=5.0
we will see how it works when we get a couple stations on RF.
thanks de k7iou 


David k7iou
 

It’s fixed, just did some testing on the system with several on the RF analog side and the DMR audio was great. I chose the 5.0 setting because kv4s recommended it on his setup webpage and previously we tried raising to 2.0 without hardly a bump.
thanks Steve
73 de k7iou