I've really grown to love the sound of albums recorded at Trident Studios in London, and I am wondering how that particular studio sound was achieved. The drums sound is unique - clean but never heavy, and never overloud. The piano sound is like no other studio. The echo chamber sounds fabulous - was it a big concrete-walled room or something curved? How were acoustic and electric guitars mic'ed up? I assume the studio was already 16-track when Hunky Dory was done there - and Trident had its own unique mixing console. Any input, folks? And photos are always welcome!