The use of pulpits is forbidden by Bahá’u’lláh; if, in order to be more clearly heard, the person reading stands on a low platform, there is no objection, but this should not be incorporated as an architectural feature of the building. …
The reader should stand where he or she will be best seen and heard by all. All minor details regarding this matter are left to the discretion of your Assembly to decide after receiving the advice of experts. As he already informed you, he suggests using fixed rather than movable seats.
Vocal music alone may be used and the position of the singers, or singer, is also a matter for your Assembly to decide; but again, there should be no fixed point, no architectural details marking a special spot. Acoustics should certainly be the main consideration in placing the singers.
He need not tell you how very important the decisions are which you will now be called upon to make in connection with completing the Temple.… He urges you, at all times, to receive the very best technical advice, and to bear in mind that the main thing is that the meetings in the Temple should be conducted in a beautiful and peaceful setting, in comfort and with dignity and simplicity, and that the audience should be able to hear perfectly and the tone values be pleasant to the ear.