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Most USB Audio Sound adapters have 2 standard input connectors such as the picture enclosed - headset can be connected directly. Typically, these devices use the CM108 or CM119 chipset from c-media ( [obscured] ). These chips have only one input for microphone on pin 27 which limits the USB adapter to a standard mono microphone.
We are interested to develop and manufacture the same USB adapter, however with STEREO capabilities on the input (microphones) and output channels (speakers). Dimensions are flexible however, the external box can't exceed 45 mm on length, 24 mm in width, and 14 mm in height.
The developer can use c-media chip CM6300 that has the same capabilities like the two above, and allow input of LINE IN LEFT (LINIL) and LINE IN RIGHT (LINIR) on pins 26 and pins 27. Microsoft sound card driver for the new dongle must be build-in for Win 7, or provided with standard installation procedure for other operating systems.
The developer will be required to provide elect...
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