With a stereo 196 kHz/32 bit audio signal it uses about 1.5 Mbits/second of bandwidth
A standard CD playing stereo at 16 bits and 44.kHz outputs 1.4 Million bits per second. An uncompressed stream with twice the bits and four times the frequency requires 8 times the bandwidth, or over 11 Million bits per second.
That is the raw data bit rate - there are substantial overheads for packet switched networks like the internet and Ethernet because the packets are encapsulated in headers and footers.
Even more overheads are incurred if much error correction is required.
Something is not adding up! Are you sure you are not reporting bytes per second, which is 8 times more than bits per second? And on your numbers a Gigabit connection might at face value support 700 streams, not 70?

