Tuesday, March 26, 2019

Ωραια σημερα έγινε διακοπή ρεύματος και ετςι μπόρεσε να ηχογραφηθεί το demo του τραγουδιου Πως Θα Ηταν


Power utility black outs are great for an almost noiseless recording.


No building structure transmitted machinery noise etc.


The demo of the song Πως θα Ηταν has been recorded.


It does not sound great. It sounds good to very good on headphones but not so on loudspeakers. Possibly cause is the recording of first order reflections, ie the acoustics are not suitable for recording. A mic does not have a brain (see the book Motion Picture Sound Engineering).


But it is a rough demo nevertheless.


Male (very softly) singing voice and upright Pleyel piano.


While recording, voice sounded softer than piano but playback seems fine since vocal mic is very close to singer. There is leakage making for a rather nice sound. So far playback only listened through the Sennheiser HD 580 headphones.


Voice mic is Audio Technica AT802 connected to the Pleiades Danbridge gentle slope high pass filter with Vicky's settings ie (R,L)=(229Ω,60mH).


Piano mic is the Grampian GR2/L connected to a Pleiades 8mH:78mH, (1:3) step up transformer followed by a Western Electric D 165831 1H:4H (1:2) step up transformer. Mic is 3ft from the center of the front panel of piano. Mic is on the right side of the piano facing it at an angle of about 40 degrees. 0 degrees being the line defined by the piano keyboard. This idea of side miking the piano comes from the Sennheiser Microphoni per cantanti brochure manual.


Both mic signals were fed to the Sony TC-D5 PRO II cassette recorder with heads just cleaned with isopropyl alcohol and the limiter switch accidentally left at on. Rec level at about 9 out of 10. A phase inverter XLR adaptor was connected at the input of the Pleiades Danbridge filter. The Grampian ribbon mic is accidentally connected as phase inverted anyway. This mic had been reribboned with a ribbon f random corrugations.


The Danbridge twin inductors are connected in series and antiphase for hum bucking or canceling.


The exact signal path of the Grampian mic is: mic - long grey cable - Pleiades 1:3, 8mH - WE 1:2, 1H - short cable - male to male sex changer - Sony TC-D5 PRO II Right channel.


The exact signal path of the AT802 mic is - mic at 2in - somewhat long brown cable - XLR phase inverter - Red black silicon laboratory cable with female XLR input - red cable connected to right post of lower Danbridge D13A decade inductor box and also to live output XLR cable through red alligator clip cable - black cable connected to lower post of Danbridge DR4/ABCD decade resistance box and at the same time to return of output cable, left post of lower Danbridge D13A to left post of upper Danbridge D13A, right post terminal of upper Danbridge D13A connected with a red silicon cable to the upper post of Danbridge DR4/ABCD, (right post of Danbridge D13A as already mentioned connected with alligator clip cable to live terminal of XLR out cable), output cable connected directly to Sony TC-D5 PRO II at Left channel.


(Ideal relaxing to play the piano, sing), in fact Danbridge boxes making up the variable Pleiades vocal filter were already connected from previous week.


So signal path in summary:


Grampian GR2/L - 1:3 8mH - 1:2 1H -

                                                            - SONY TC-D5 PRO II - TDK SAX 60

AT802 - phase inverter - Pleiades (229Ω,60mH) -





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