Here is an interesting old record (1968) from Italian composer Enore Zaffiri, "Musica Per Un Anno". In SIM Proceedings there is an interesting article where Andrea Valle analyses "Musica Per Un Anno" and reconstructs it in SuperCollider environment (www.aimi-musica.org/wp-content/uploads/2014/10/attiZaffiri.pdf).
Valle has also interviewed Zaffiri and got some interesting information about Zaffiris original analog implementation of MPUAN. Zaffiri had only 4 sine wave oscillators, two tape recorders, frequency meter, custom build impulse generator and a tape echo. He first hand calculated the algorithmic input data for each sine wave (at most there are 12 overlapping layers of sine waves), recorded it in pieces and constructed the composition with cut-and-splice operations ! In MPUAN there are 720 sequences grouped in 360 couples, each one being assigned to one day in the year of 360 days. The year is subdivided to 12 months of 30 days and a day programs granularity is based on 1 hour timespan.
That has been an enormous work to implement in analog way !