Description:
The GL Real-Time Multi-Channel Audio Driver option allows almost any software, which normally sends/receives sound to a sound
card, to redirect the audio streams to/ from timeslots on a T1 or E1 line. The Real-Time Multi-Channel Audio Driver is an optional piece
of software for GL's T1 and E1 Analysis cards, and works with almost any sound software such as Adobe Audition, Windows Media
Player, etc. This Audio Driver may be installed on Windows 2000 and Windows XP systems. A real-time view of Adobe Audition working with GL's T1/E1 Cards is shown above. The Realtime Multi-Channel Audio Driver is not supported on the dual and
single laptop platforms. It is only supported on the single and dual PCI cards.
Some of the advantages of using commercially available sound card software directly with GL's T1/E1 cards are:
- Real-time views of multiple channels/timeslots simultaneously
- Full featured audio editing features with DSP effects
- Play, edit, mix audio streams
- Apply special effects, e.g. noise reduction, fade, equalization, delay, echo, etc.
- Convert to/from different file formats
- Multi-channel record and playback
- Real-time data analysis, spectral views, frequency and phase analysis, statistics and histogram analysis
The Audio Driver can work in a multi-channel mode with multi-channel sound software such as Adobe Audition. When used with Win
2000 OS, the GL Audio Driver allows Adobe Audition to record up to 10 audio streams directly from 10 different timeslots from one or
more T1 or E1 trunks. Likewise, up to 10 separate files loaded in Adobe Audition can be played out, on up to 10 different timeslots
among one or more T1 or E1 trunks. The number of different T1 or E1 trunks depends on the number GL Analysis cards installed in the
PC. With sufficient CPU speed (~1 GHz or higher), and a good performance hard drive; you can even record 10 streams while playing
10 streams, using 2 instances of Adobe Audition. On Windows XP systems, up to 14 audio streams can be recorded or played. Cool
Edit 2000 can access the Audio Driver to play or record only one stream from any one selected timeslot from any T1 or E1 trunk.
Once installed and enabled, the GL Real-Time Multi-Channel Audio Driver presents (exposes) to the Windows OS up to 14 full-duplex
(bi-directional) virtual Audio 'Devices', which are named GL Audio PCM Channels 01 to 14 (01 to 10 on Windows 2000 systems). Each
GL Audio PCM Channel is associated with, or mapped to one of the timeslots (receive AND transmit) available from among the T1 or
E1 trunks that are connected to the GL Analysis card(s) installed in the PC. Selecting which trunk\timeslot is mapped to a particular
GL Audio PCM Channel is controlled by the separate GL Audio Configuration application, as shown below.
The GL Audio Configuration application provides the 'patch panel' function to map a desired T1 or E1 trunk\timeslot to each of the
available full-duplex GL Audio PCM Channels. For example, the user assigns GL Audio PCM Channel 01 to GL Dual T1 Analysis Card 1,
timeslot 1. The Audio\Data stream which is being received by the Analysis card on Card 1, timeslot 1, is now available for recording in
any sound recording program\track that has GL Audio PCM Channel 01 selected as it's recording source. Likewise, in the other direction,
any sound program\track which has a file loaded for playback, and has GL Audio PCM Channel 01 selected as it's Playback destination
(Output), will have the file played out (transmitted) on GL Analysis card 1, timeslot 1. If necessary, record and playback can be done
simultaneously on one or more GL Audio PCM Channels, by using a second instance of the sound program (one for recording, one for
playing). The user can actually change GL Audio PCM Channel assignments, if desired, 'on the fly', while record or playback operations
are actually in progress. The application also allows the user to select which GL Analysis card or cards are to be used currently by the
GL Audio Driver, when there is more than one type of GL Analysis card installed in the PC. Any mapping of GL Audio PCM Channels that
the user creates may be saved for future use by clicking on the Save Settings button. Clicking on the Max Volumes ensures that all
Windows Volume Controls are set to maximum on all GL Audio PCM Channels, so that Windows is not altering (attenuating) the audio
streams as they pass through the system.
Since all of these GL Audio PCM Channels appear as active audio devices in the OS, they are completely accessible for use by almost
any audio editing program (that would normally play to, or record from a sound card, such as Adobe Audition). Simply select the desired GL Audio PCM
Channel(s) from within the device setting screen of the sound program, if possible; or use the Windows Audio device selection screen
in Control Panel\Sounds and Multimedia\Audio. The sound card in the PC can be left operational if desired, such as for listening to the
files you've recorded. On Windows 2000 systems only, leaving the sound card active will displace (eliminate) one of the GL Audio PCM
Channels, since Windows 2000 has a 10 audio device limit.
Audio data being received on a selected ('mapped') timeslot by the T1 or E1 Analysis card is routed along it's assigned GL Audio
PCM Channel on through the various drivers, where it is converted to linear data, and then delivered to the sound program in use
for recording, such as Adobe Audition; where that GL Audio PCM Channel has been selected as the Record source.
Similarly, audio data from a file which has been loaded for playback in the sound program is routed out through the various drivers,
where it is converted to mu-law (T1) or A-law (E1) data, and delivered to the GL Analysis card, where it is transmitted out on the
trunk\timeslot assigned to the GL Audio PCM Channel which was selected in the sound program.
Photo of PCI Ultra T1/E1 Cards
Buyer's Guide
| Item No. |
Item Description |
| XX017 |
Real-Time T1/E1 Multi-Channel Audio Driver |
Note: The Realtime Multi-Channel Audio Driver is not supported on the dual and single laptop platforms. It is only
supported on the single and dual PCI cards.
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