Differences between analogue and DMR audio.
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DMR equipment manufacturers have standardized on the AMBE+2 vocoder from DVSI Inc. to digitize and compress speech, allowing it to be sent over the air, using very little bandwidth. When migrating from analogue to MOTOTRBO, here is what users can expect in terms of audio performance and fidelity:
|Users will experience||Users will not experience|
|Background noise reduction||Improvement in audio clarity|
|Better readability in poor signal areas||Analogue-like speech reproduction|
|Low bandwidth digital audio||MP3-like performance|
Analogue radios were very tolerant to distorted audio (e.g. shouting or talking away from the microphone) and this allowed poor usage habits to perpetuate. All DMR radios require some degree of user discipline and careful consideration of the CPS settings – a qualified and trained technician can assist with optimal settings and accessories for the customer.
This video illustrates the above differences.