Configure audio encoding – Epiphan Pearl Mini Live Video Production System User Manual

Page 221

Pearl Mini User Guide

Configure audio encoding

If your channel includes audio sources in any of the layouts, then

AAC 48 kHz

is set as the default audio

codec for the channel. You can choose a different audio codec for a channel using the Admin panel. The
following table lists the supported audio codecs and bitrates.

Table 42

Supported Audio codecs and bitrates

Value

Description

AAC

The AAC (default) audio codec is comparable to MP3 and may produce better
sound quality with a similar bit rate. Supported values are 16, 22, 44 and 48K kHz.

Most digital signals (HDMI or SDI sources) use 48 kHz audio. Matching the encoded
level with the source level provides the best sound quality by avoiding audio
resampling. For analog signals, 44 kHz provides higher sampling.

The maximum bitrate for mono encoding of a 44 kHz signal is 264 kbps. For stereo,
320 kbps is supported. Note that lower bitrates (e.g. 32 kbps) with a 44 kHz signal
may result in distorted audio.

MP3

MP3 provides a common audio format for audio storage. Supported values are 22
kHz, 44 kHz and 48 kHz.

Flash (FLV) doesn't support 48 kHz MP3 audio. When selecting this
value you'll need to use a media player to preview your channel.

PCM

Pulse Code Modulation (PCM) is a standard for digital audio in computer and other
devices such as, digital telephone systems.

Most digital signals (HDMI or SDI sources) use 48 kHz audio. Matching the encoded
level with the source level provides the best sound quality by avoiding audio
resampling.

Flash (FLV) doesn't support 48 kHz PCM audio. When selecting this
value you'll need to use a media player to preview your channel.

To change the audio codec for a channel:

1. Login to the Admin panel as

admin

, see

Connect to the Admin panel

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