the NSA selector

the NSA selector is a eurorack module with two ethernet jacks and one audio output. any bit on the network will be sent to the audio output.

this is not an "audio interface". we do not play back any "format" such as RTP or MP3 or WAV or the like. the eurorack module does not "speak" any protocol. all traffic is forwarded from one network jack to the other unmodified. it's just tapped, intercepted to convert it to audio.

DO WATCH THE VIDEO (link on the right)!

examples include

• sequencer script
• echo effects
• link saturation and recovery oscillations
• helicopter sounds from network sniffing
• drone synth through display forwarding
• paint images, listen to the pixels
• a delta-sigma modulator do modulate back in 4bit 25MBit/s network audio (effectively noisy 9 bit audio)
• a MIDI interface allowing for files or network actions per note

the tech bits

the NSA selector is a fast ethernet (FE=100Mbps) network switch with three ports. the two front ports are switched, and the third port is only available internally as 4 bit MII bus. it is configured as mirror port of the two front ports and wired to a 4 bit DAC and a low-pass-filter.

• 4 HP wide
• 55 mm deep
• +12V : 100 mA
• +5V : nothing
• -12V : 2 mA
• Switch chip: LAN9303
• Config: 24LC64 I2C EEPROM

Photos