I've seen some talk of John Paul Jones using flatwounds for Zeppelin stuff, especially the early albums. But apparently he switched to rounds before Zeppelin. This is from an interview:
Were you using flatwounds?
No, Rotosound roundwounds. I stopped using flatwounds during my session days; they were a bit too thumpy. The Rotosounds gave me better clarity, and I also needed the sustainif Robert stopped singing, there were only two of us minding the shop, as it were. Id change the strings every week maybe; Im not sure.
Were you using flatwounds?
No, Rotosound roundwounds. I stopped using flatwounds during my session days; they were a bit too thumpy. The Rotosounds gave me better clarity, and I also needed the sustainif Robert stopped singing, there were only two of us minding the shop, as it were. Id change the strings every week maybe; Im not sure.