In the interest of readers who may be considering MSB and/or the Pro ISL solution, I have found it to be an excellent option from the Taiko Extreme to the MSB Reference dac.
My configuration has the "upgraded" USB card in the Extreme, and the USB cable into the MSB module is a Shunyata Omega.
I had previously demo-ed the Premiere dac with the Pro ISL and a Straightwire USB cable (and the Omega), which also sounded great here.
I have *not* compared ProISL to an AES implementation.
The fiber input to the Extreme from the ProUSL module would allow me to isolate the server in another room (actually to another neighbor), but I cannot bear to move it out of its audio room location.
There was discussion of the ProISL in a WBF thread from 2019, wherein Emile Bok of Taiko (
@Taiko Audio ) quoted a post on Audiophile Style:
"I’m from MSB Technology and I would like to share a few of the technical advantages the Pro ISL interface (and Pro USB) has over other digital audio interfaces. The only downsides of the Pro ISL interface are 2W of power consumption and compatibility only with MSB DACs.
DAC syncronous scrambled streaming data. Clocking of the data stream is syncronized to the DAC with a separate clock feedback link in a second fiber. Unlike block based protocols like Ethernet or USB, the Pro ISL interface does not generate electical noise in the audible band upon reception.
Strong forward error correction (optionally traded for more audio data channels) instantly corrects most errors including up to 1024 bit gaps in the audio data stream upon reception.
Very strong CRC based error detection (an HD8 CRC polynomial protects each 64 bits of audio data, an HD10 CRC polynomial for misc data). Allows quick identification of failing links and prevents playback of erroneous data.
Less than 10 milliseconds to lock to an active data stream.
Very low noise reception due to very low noise hardware decoding, data stream scrambling and balancing. Ethernet for example requires a complex operating system and usually an electrically noisy general purpose processor for reception and decoding. Ethernet, even optical Ethernet, also uses large asyncronous data blocks that generate much low frequency noise during decoding.
Perfect isolation from the non conductive single mode glass fiber.
Greater than 1km cable lengths are possible. Also no EMI radiation or conduction due to non conductive cabling. Cabling is safe safe to run anywhere because it is non conductive.
Much lower received jitter than any other digital audio interface. Cabling even at extreme lengths adds almost no jitter because single mode glass fiber cable has nearly zero dispersion and extreamly low attenuation of the modulated infrared laser light.
Supports 12 channels of 32bit/768Khz PCM data with forward error correction or many more channels without. Supports up to 32bit/3Mhz 2 channel PCM data. Supports 8 channels of 16x native DSD. Support for data stream format extensions for future data formats. Simple mailbox style communication channel for misc information. Strong CRC based error detection for all data. The Pro USB uses just a subset of the complete capabilities of the Pro ISL interface so it is ready for future expansion.
The Pro USB is as easy to install and configure as any other of our USB interfaces."
AS Post:
https://audiophilestyle.com/forums/...-for-msb-pro-isl-input-module/#comment-937005
WBF Thread:
Has anybody heard it or getting one? This looks like a nice solution to me and reasonably priced. A review: https://www.monoandstereo.com/2019/03/new-msb-technology-pro-usb-review-part.html?m=1
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