Lorenzo Bernardi is probably a nom de disque.
Mendelssohn – Die erste Walpurgisnacht Op.60

Overture: The Change of Winter to Spring
1. A Druid and Chorus of the People
2. An Aged Woman and Chorus of the People
3. A Druid Priest and Chorus of Druids
4. Chorus of Druid Guards and People
5. A Druid Guard
6. Chorus of Guards and People
7. A Druid Priest and Chorus
8. A Christian Guard and Chorus of Guards
9. A Druid Priest and Chorus of Druids and People

“Lorenzo Bernardi and Chorus and Orchestra of the Leipzig Bach Festival”

Mediafire link for Mendelssohn – Walpurgisnacht

(These are zip files – left click the link, download the files, then unzip when downloaded)

Everest 3229 (Electronic Stereo)
Recorded ?

This recording, presumably from a German or Austrian radio source, leaves its soloists (soprano, tenor and bass) unnamed. The conductor and other performers seem to be pseudonymous. Although the first side of the record is roughly at correct pitch, the second side drifts downwards until a horrendous edit about a minute from the end, where the pitch and ambience are suddenly hugely different. This final section may even come from a different performance. I have endeavoured to fix the pitch, and reduce the jarring effect of the change of sound quality. I’ve also mixed the sound back to mono.

I’ve included the closing passage of the work prior to pitch adjustment, so that the grating effect of this awful edit can be fully appreciated.

If any recognises any of the soloists or indeed the whole performance, do let me know!