... item 16 channels telephone call recording software and Phone voice recording device Features:PCI card interfaceThe unique DSP processing ... playback can simultaneously and independent.Can dynamically select a different voice encoding speed, and real-time speech compression and decompression ... 300Hz 3400Hz ~On 256K 32K buffer: an uploaded file. -Digital voice: A/u my PCM, ADPCM. -Data rate: 64Kbps, 32Kbps ...