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What is the difference between call recording connectors
"I will, for sure, buy the 650 Intelligent
Recording Interface. The difference is obvious . It
looks and sounds as though it will be ideal for me.
The web site was excellent and really did help. It is
also fantastic customer service!! Thank you very much."
Susan Worsfold
Call recording involves two issues:
1. How do you get the audio from the telephone and
2. What do you record that audio on
- On this page we will try to help you to understand
why on telephone recording connector will give you
better audio from the telephone than another. We have
written this page because we realise that it can be
hard to understand why different connectors are available
and at different prices. This difficulty is compounded
because every manufacturer advertises even the simplest
product as giving "perfect sound quality"
etc. You can also watch a short presentation on the
key benefits of Retell's Intelligent Recording Interface
over basic handset connectors by clicking here.
What to look (or rather listen) for in a recording
of a conversation:
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| Listen to the quality of the near
person's voice. This would be your own voice, or
in a call centre environment, this would be the
quality of the agent's voice. With the best connector
the near person's voice will be of a clear and bright
studio quality. With the best connector the two
voices will be recorded at the same level. |
Simple connectors will record the
near person's voice more muffled. Also listen to
the balance between the the near and far persons'
voices. Less sophisticated connectors will record
the far person's voice much louder than the near
person's voice. Also listen to the effects of automatic
level controls. If ALC is used to balance a quiet
near person's voice with a loud far person's voice
then, although the two peoples voices will be recorded
at similar levels, the near person's voice will
have much more background noise. |
What to listen for when both people talk at once:
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| With a sophisticated connector it
will be easy to hear both near and far parties voices,
even if they both talk at once. |
With a simple connector relying on
an automatic level control in the recorder the level
will be adjusted to record the loud far person's
voice correctly, which means that the near person's
voice will become inaudible. |
What to listen for when both people stop talking
for a few moments
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| Listen to the effect of automatic
level controls if both people stop talking. A sophisticated
connector does not need ALC in the recorder to balance
the voices, which means that there is no increase
in background noise during silences. |
If the recording is made with a simple
connector relying on ALC in the recorder (or software),
then if both people stop talking you will be able
to hear the background noise "pump up",
falling away when the far person talks again. This
"pumping" of the background noise can
make the recordings more tiring to listen to. |
The above recordings were made using Retell's 957
software with the MPEG Layer-3 Codec at 22,050 Hz 56
kBit/s recorded directly into an MP3 file.
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The Intelligent Recording Interface
The Intelligent Recording Interface is the most
sophisticated telephone recording connector in
the world. Click here
to listen: 
It can even record in stereo as this recording
demonstrates.
List of products that use this connector
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