Theoretica Applied Physics BACCH4Mac Stereo Purifier Review

Tom Martin reviews the BACCH4Mac proprietary software which purports to return stereo sound to its original design and purpose; a type 3 product, and one of the most interesting breakthroughs in high-end audio of the last few years.

Andy Quint’s Preview of BACCH SP: https://youtu.be/p0fGZnDIZ5k?si=Rhoc5SVhRtcM_0Xq

How Tom set BACCH4Mac up:

• BACCH4Mac is run on the "streamer" which is a MacMini.

He runs ethernet from his router into a MacMini (M2).

He runs a Roon Core on the MacMini,

The Roon Core then feeds BACCH4Mac software, also on the MacMini.

• From the MacMini's USB out data goes into a dCS DAC.

• The dCS DAC feeds into Tom’s preamp

• The preamp feeds power amps which drive speakers

With this setup, Tom can run other digital sources without BACCH through the dCS . He can also run analog sources without BACCH via the preamp. It is possible to run analog and other digital sources (e.g. CD), through BACCH; he just didn't set it up that way so that he could do comparisons of BACCH to other sources without any BACCH touching the signal.

00:00-02:09- Brief Summary of BACCH4Mac

02:09-04:56 What is BACCH Processing?

04:56-10:31 What Problem Are We Trying to Solve?

10:31-17:14 Visualizing the Problem w/ Stereo

17:14-32:34 Sound Quality of BACCH4Mac

32:34- Conclusion & Final Thoughts

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About Tom Martin:

Tom is a long-time audiophile. He began his reviewing career after acquiring the The Absolute Sound magazine in 1997 and then hi-fi+ magazine in 2002. He has worked closely with Harry Pearson and Robert Harley at TAS and with Roy Gregory and Alan Sircom at hi-fi+. Since Tom and his teams expanded the TAS and Plus platforms in the digital domain, he has served as Chief Content Officer.

What Is The Absolute Sound?

The Absolute Sound magazine has been a leading publication in high-end audio since 1972. Since the early 2000s, The Absolute Sound has expanded to include web, newsletter, digital magazine, social media, YouTube and Substack platforms. The Absolute Sound platforms have a global audience of over 500,000 audiophiles.

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