He studied first mathematics and physics in Mannheim, then Protestant church music at the Hochschule für Kirchenmusik Heidelberg.

He founded and conducted the Bachchor Wiesbaden, the Bach orchestra, the Kleine Kantorei (Little chorale) and the Johann-Walter-Kreis, an ensemble for Renaissance music, especially sacred and secular music of Luther's time.

[3] Ludwig conducted performances of oratorios, including less-known works and premieres.

[2] He played premieres of organ work by Zsolt Gárdonyi, Theo Brandmüller, Harald Genzmer, Claus Kühnl, Rolf Schweizer and his own compositions.

He also worked as a singer (bass-baritone), pianist, instrument builder, stage director, arranger, librettist, author and editor.