RemoteMix One - Cabled Mobile Phone Audio Interface

RemoteMix One


RemoteMix One combines professional audio electronics with a flexible communications interface which connects to mobile phones for broadcasting, all housed in a rugged new belt pack design. It is based on the well-liked BluePack - but without the Bluetooth - to allow live "man-on-the-street" interviews using a cell phone running software audio codec apps such as Luci Live, CSipSimple, Skype and Comrex VIP QC. Its ergonomic belt pack design provides a professional look and feel to field reporters and the high-quality microphone preamp and powerful headphone amplifier make sure the message gets through. RemoteMix One plugs into the mobile phone's headset connector and lets users plug in a broadcast or professional microphone and headphones, both with level controls, plus mix in pre-recorded audio for transmission through the 3.5mm stereo line input jack. In addition to the ¼" stereo headphone jack, the RemoteMix One also has a 3.5mm stereo line output jack that provides full bandwidth microphone signal on the left channel and return audio on the right channel.

Whilst in an ideal world, Bluetooth connectivity to a mobile phone for broadcast would be desirable, in its low-delay two-way "headset mode", Bluetooth only offers normal telephone quality of 300Hz - 3.4kHz. Using the cabled connection, RemoteMix One offers end-to-end full broadcast audio bandwidth. If the phone is able to run a software codec or provide HD Voice connectivity, audio bandwidth will be limited only by the audio codec (for example 7.5kHz for G.722 or 15kHz for AAC-ELD). Without a codec, like any phone call live interviews are limited to 3.4kHz voice bandwidth back to the station, but still with the huge advantage of being able to plug in a full broadcast microphone and headset.

RemoteMix One connectors

The stereo output jack allows you to make a full bandwidth recording using an external audio recorder for transfer back at the station or to use a standalone codec. The stereo headphone output gives you a mix of the XLR microphone input, 3.5mm input and return audio. The powerful ½ watt stereo headphone amplifier will also cut through any crowd noise. Connection to the phone is via a dedicated ¼" jack interface and 2.5mm 3-pole or 3.5mm 4-pole adapter cable that "fools" the phone into thinking that a cabled headset is attached.

The Beltpack range includes:

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RemoteMix-1 Block Diagram:

RemoteMix One Block Diagram
MicFemale XLR 2k ohm (-35dBu nom)
Line3.5mm stereo jack socket 20k ohm (-10dBu nom)
Line3.5mm stereo jack socket 100 ohm (-10dBu nom)
Left = Microphone (at line level)
Right = Audio return
Headphone¼" stereo jack socket 8 ohm, ½ watt per channel
Frequency Response
Telephone mode transmission (phone)300Hz - 3400Hz
Codec transmissionDepends on phone codec / audio connection - maximum bandwidth 30Hz – 17kHz
Dimensions120 x 95 x 42mm (4.7 x 3.75 x 1.65") approx.
Weight283 grams (10oz) approx.

The Bluetooth word mark and logos are owned by the Bluetooth SIG, inc. All trademarks are recognised. Glensound GS-MPI004 BROADCASTERS MOBILE (CELL) PHONE GS-U2S, GSGC25, GSGC24, G722, G.722, GSGC5, GSGC4, GSGC8, SixMix, Six Mix, 6-Mix, Henry Engineering, TieLine Commander, Luci, LuciLive, LuciLive-2, Miki