Over the years, and especially on CD there has been many re-issues of the soundtrack to à bout de souffle. Mostly various collections of French New Wave music throughout the late 20th century and 21st century. But, I have to say the best is from the mysterious label Doxy, who issued this album sometime in 2015. It's a single disc, but in 45 rpm, and one side is the score by Martial Solal, performed by the great pianist as well as with top-notch French Jazz musicians from 1958. What makes this specific album unique is that on the other side, it's "Concert pour clarinet et orchestra by Wolfgang Mozart; performed by an orchestra conducted by Sir Thomas Beecham.
For those who are fans of the film, you know the Mozart recording is played in one scene, where Jean-Paul is in hiding from the police and he's with his love. Now, as far as I can gather, Doxy is very much a bootleg record company that puts out fantastic out-of-print albums or recordings that somehow lost their copyright - nevertheless, this mysterious label has released incredible albums on vinyl, and always with wonderful packaging.
So, as I mentioned in the opening paragraph, I would buy this edition of the soundtrack, not only for the Mozart piece, but also the sound / mastering is great. Not sure where they get the original sound source, it can be digital, but still, you're paying for their great curating taste. Solal's music and performance are superb. It mirrors the film's sense of wonder and adventure, and it's supreme French Jazz, which to me is über-cool.