Audio quality in Milonga: Test on INVIERNO

The sound quality of the audio tracks that are proposed in tango milonga:

As standard you used the famous song “Invierno” engraved 18 August 1937 from’ Francisco Canaro Orchestra with singer Roberto Maida.

From the graphs we see that an acquisition from a different quality, allow to record more faithful some instruments, and penalizing others.
E’ Clearly, a more graphic vacuum corresponds to a recording less faithful or lower quality.

The following four images of the sound spectrum of different audio formats:

1 Mp3 96 Kbps 44000 Hz (fm quality) 2 Mp3 128 Kbps 44100 Hz (std)

analysis spectrum invierno mp3 2_5 mb 95 kbs 44100mp3 invierno spectrum analysis 3.3 mb 128 kbs 44100

3 Mp3 320 Kbps 48000 Hz (HQ) 4 Wav 3028 Kbps 96000 Hz (HQ CD)

analysis spectrum invierno mp3 8_5 mb 320 kbs 48000analysis spectrum invierno wav 81 mb 3072 kbs 96000 hz

As seen with the MP3 format 1 , 2 you lose almost the entire Bass, the rhythm of the Piano, the Cello and Viola; but also higher harmonics in 10.000 HZ and the lower ones in 60 HZ. How well you lose much of the voice.

Amplitude or tone range of instruments and voice in HZ

Amplitude / Sound range of instruments and voice in HZ

The emotions are influenced more by the low mid frequencies, to dance there is based on “carpet rhythmic bass” type songs 1 , 2 mp3 little fit for use in the ballroom as “drains” energy.

This is the result of vision between the graphs ( listenable opening the link ). But in reality the listening test should be done using a Hi-Fi. The comparison will detect more “sharpness” , “bodied” of the various elements for the sizes 4 , 3, and a very sound “kneaded” for 2 , 1.

Also that the “heat” song 4 will be much greater than all the others and with very high volume the sound will remain little annoying ear.

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It was not possible to perform a graph 5 “Vinyl” because the instrumentation of the format 4 not getting. The engraving on the disc being analog has a much higher quality.

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Conclusions:

Almost never the milongas have a sound system suitable to the music of tango, often the acoustics of the room has echoes and resonances. Having a “ingredients” of “high quality” reduces the problems of your room acoustics and improves the energy of milonga. Increase the volume in the room by analogy is a bit like doing the magnification of an image; more is poor before shelling.

The organization offers DJ having libraries with audio formats “in High Quality” and which uses equipment “Hi-Fi”, even digital ones, such as CD players or SOFTWARE SOUND CARDS and Professional, will derive tangible benefits.

 

Anyone interested to FORMAT 4 can request information here:

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The data of the acquisition for sound 3 , 4 used for the tests:

ROLAND CAKEWALK UA 1G ( Interface analog / digital audio )
CABLE DIRECTION ( Double shielded + connections gold + ferrite core )
PRE AMP RIAA ( Class A Tube Amp 2 12×7 )
NEEDLE ( Stanton D61 )

Appendix:

The fundamental frequencies in Hz of music :

Instrument Frequency range in Hz
Piano concert 27.50 – 4.186.00
Tuba 43.65 – 349.23
Contrabass 41.20 – 246.94
Cello 65.41 – 987.77
Violet 130.81 -1.174.00
Violin 196.00 – 3.136.00
Clarinet 164.81 – 1.567.00
Trumpet 164.81 – 987.77
Guitar 82.41 – 880.00

Human voice frequency range required in the classical opera
Type of voice frequency range in Hz
Low 87.31 – 349.23
Baritone 98.00 – 392.00
Tenor 130 – 493.88
Contralto 130.81 – 698.46
Soprano 246.94 – 1.174.70

Bibliography and notes on’ acoustics:

http://www.tnt-audio.com/topics/frequency.html

http://fisicaondemusica.unimore.it/Pagina_principale.html

http://www.vivoscuola.it/us/rsigpp3202/suono/udibile.htm

http://www.tnt-audio.com/clinica/inter.html

 

Author: DJ Massimo

DJ resident of La Veriega, the outdoor milonga in Buenos Aires. Uses only the vinyl to spend evenings with pure music MILONGA. While with BIEN PULENTA hi-res audio files are to guarantee the public the highest fidelity sound and a musical offering "Oxygenated" that guarantees the utmost danceability.

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