Aficionados of Russian repertoire will already know the Violin Concerti of Tchaikovsky (1878) and Glazunov (1904), each full of energy, rhythmic drive and memorable melodies so typical of Russian Romantic music. This Lyapunov concerto dates from 1915 (revised in 1921), although, to my ears, it sounds more like a 19th Century composition (thus, in a musical context, placing it c.10 years AFTER Stravinsky's Firebird, Petroushka and Le Sacre du Printemps). It's written in a single, almost rhapsodic, movement lasting c.23 minutes, including a rambling, but technically demanding cadenza. Melodies are far less memorable than other Russian violin concerti, although there are genuine moments of gentle wistfulness. If you want to get to know Russian Violin Concerti after Tchaikovsky and Glazunov, you may find more pleasure and musical interest in hearing those written by Arensky (1902) and, yes, even the Myaskovsky of 1938 (did he live in a time-warp?). Incidentally, the violin soloist here really makes the most of his opportunities to shine.
Lyapunov's First Symphony is an earlier work, dating from 1887, and all the better for it (although less memorable than Tchaikovsky 5th Symphony of 1888). It has plenty of rhythmic drive and cross-rhythms, many memorable melodies, a scampering scherzo, and frequent examples of characteristic Russian orchestral sonority. I enjoyed the symphony far more than the Violin Concerto, but as a wind player myself, I suppose that was inevitable. The orchestral sound and tuning were also pretty decent, with typically lush Russian string sound, plenty of delicious lower-strings sonority, and occasional touches of gorgeous lower brass. If you know the Borodin and Balakirev symphonies (and you should!), you will find many parallels here, and much to enjoy.