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27
S t r e a m 3 M
Glossary
DAB
Digital Audio Broadcasting
DLS
Dynamic Label Segment – short text information broadcast with DAB audio
FM
Frequency Modulation
MSC
(USB) Mass Storage Class (device)
RDS
Radio Data System
UI
User Interface
UPnP Universal Plug and Play
USB
Universal Serial Bus
WLAN Wireless Local Area Network
Specifications
Type: Spotify Connect, Internet Radio, DAB/FM, Bluetooth and UpnP Streaming Media Player
Inputs: Ethernet/Wi-Fi (incl. 5G), 5V DC power via Mini USB, DAB/FM antenna plug
Output: RCA stereo, Spdif Optical.
Main voltage: 220-240V, 50/60Hz
Output sensitivity: 2000mV (RCA) analogue
Optical output max.24bit/192Khz
Separation: >50dB
D/A conversion: Cirrus Logic CS4344 max. 24bit/192Khz. (notice FLAC support max. 16 bit)
Audio Codec Bit-rates and Sample Frequencies Bit-Rates
The following table summarises the maximum supported bit-rates for the various audio formats supported.
.
Codec
Supported
Min [1]
Max [1]
LPCM / WAV [2]
1.536 mbit/s
48 kbit/s
1.536 mbit/s
FLAC
1.5 mbit/s [3]
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AAC
320 kbit/s [3]
8 kbit/s
576 kbit/s
MP3
320 kbit/s
8 kbit/s
320 kbit/s [4]
WMA
320 kbit/s [3]
4 kbit/s
384 kbit/s [5]
ALAC
1.5 mbit/s [3]
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[1] – These are the minimum /maximum bit-rates for 2-channels only (multi channels can drastically increase
this).
[2] – The LPCM / WAV bit-rate is calculated as (sample frequency * number of channels * sample size in bits).
The maximum supported bit-rate is for a stream at 48 KHz, 2 channels and 16-bits per sample.
[3] – This is the maximum bit-rate tested. Higher bit-rates may work but are not currently tested.
[4] – This is the MP3 ISO standard maximum although some decoders can generate much higher data rates
which we do not support.
[5] – The maximum offered by most encoders is 320 kbit/s (WMP limits it to 192 kbit/s)
Samples Frequencies
STREAM3M supports samples frequencies in the range of 6 KHz to 48 KHz in 1 Hz increments. Any stream
which contains samples frequencies outside this range will not be supported.
Codec Sample Resolution
All decoders use 32-bit internal precision and output 16-bit PCM except FLAC and MP3 which output 24-bit
PCM. The FLAC decoder supports up to 16-bits