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Tune audio levels in DStar gateway #analog_bridge
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Hi,
I would like to set the correct audio levels in my DStar gateway, where I use ircddbgateway / MMDVM_Bridge and 2 Ananlog_Bidges connected via USRP A simple AB connection diagram is below AB DMR AB DStar [USRP] [USRP] RX <--------------------------------------------- TX TX ---------------------------------------------> RX aslAudio = AUDIO_USE_GAIN aslAudio = AUDIO_USE_GAIN dmrAudio = AUDIO_USE_GAIN dmrAudio = AUDIO_USE_GAIN agcGain = 10 agcGain = 10 dmrGain = 0.35 dmrGain = 0.35 I would like to be sure that when I set the audio levels from DSTAR to DMR I need to correct it: Tune in USRP_DSTAR agcGain and dmrGain in USRP_DMR ???? when I set the audio levels from DMR to DSTAR: Tune in USRP_DMR agcGain and dmrGain in USRP_DSTAR ??? I would like to suggest whether it is correct or how to choose the right levels in both directions 73 Waldek SP2ONG
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Set one Analog_Bridge to unity in both directions and use the other Analog_Bridge to set levels in and out.
Sent via smoke signal (AT&T)
From: main@DVSwitch.groups.io <main@DVSwitch.groups.io> on behalf of Waldek SP2ONG <sp2ong@...>
Sent: Tuesday, September 10, 2019 7:02:31 AM To: main@DVSwitch.groups.io <main@DVSwitch.groups.io> Subject: [DVSwitch] Tune audio levels in DStar gateway #analog_bridge [Edited Message Follows] Hi,I would like to set the correct audio levels in my DStar gateway, where I use ircddbgateway / MMDVM_Bridge and 2 Ananlog_Bidges connected via USRP A simple AB connection diagram is below AB DMR AB DStar [USRP] [USRP] RX <--------------------------------------------- TX TX ---------------------------------------------> RX aslAudio = AUDIO_USE_GAIN aslAudio = AUDIO_USE_GAIN dmrAudio = AUDIO_USE_GAIN dmrAudio = AUDIO_USE_GAIN agcGain = 10 agcGain = 10 dmrGain = 0.35 dmrGain = 0.35 I would like to be sure that when I set the audio levels from DSTAR to DMR I need to correct it: Tune in USRP_DSTAR agcGain and dmrGain in USRP_DMR ???? when I set the audio levels from DMR to DSTAR: Tune in USRP_DMR agcGain and dmrGain in USRP_DSTAR ??? I would like to suggest whether it is correct or how to choose the right levels in both directions 73 Waldek SP2ONG
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SP2ONG Waldek
Steve,
Thank you, set in the first AB aslAudio = AUDIO_UNITY dmrAudio = AUDIO_UNITY and try to tune in the second AB aslAudio = AUDIO_USE_GAIN dmrAudio = AUDIO_USE_GAIN and adjust agcGain and dmrGain One question about a scalar, if I would like to use AUDIO_USE_GAIN, it is only a multiplier, for example agcGain = 2, this is 2 times the level but if I would like to use AUDIO_USE_AGC, the agcGain scalar will be in dB? Waldek
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For transcoding, I would never use AGC. Only use linear gain (AUDIO_USE_GAIN) for best results.
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SP2ONG Waldek
Mike
Thank you for sharing your experience and I can confirm your suggestion after the trials I did with linear gain and AGC Waldek
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David
Dear Sir
I have some confuse,please help me . If I want to tune P25 to DMR (dmr can hear voice louder ,so I need to set Audio_Unity in AB_P25 And use Audio_USE_Gain on AB_DMR modify dmrgain of AB_DMR ? Thanks
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