Des photos de vos home-studios et les discussions qui vont avec
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Whynot
305
Posteur·euse AFfamé·e
Membre depuis 22 ans
Sujet de la discussion Posté le 13/11/2004 à 22:36:33Des photos de vos home-studios et les discussions qui vont avec
Aaaaah merci mon gars !!!
jfherts
792
Posteur·euse AFfolé·e
Membre depuis 19 ans
47881 Posté le 19/07/2019 à 11:14:03
Hello à tous,
Concernant le placement du sub, j'avais trouvé un jour un chouette document (en anglais), qui met en garde par rapport aux modes de la pièce, l'utilisation de la fréquence de coupure, etc...
Sören Hjalmarsson - Subwoofer Calibration :
"Subwoofer Calibration
Find the optimal crossover frequency, which is usually between 60 to 80 Hz, with the assistance of
bass sweeps. These are tones which are set at a uniform level from 200 to 25 Hz. Pay attention to
resonances in the area of the crossover frequency (only listen to the sweep through the subwoofer at
this point).
The positioning of the subwoofer has a great influence on the standing waves or 'room modes'. A
corner position is the least favorable in this respect, followed by a position against a wall. You have
the greatest chance of a uniform sound when the subwoofer is free standing in the room.
In rooms with parallel walls, a virtual partitioning of your studio into uniform 4 by 4 fields, is a
further assistance in the search for an ideal location. Divide the room length and breath by 4 and
imagine lines on the floor, or mark these lines out temporarily with masking tejp(see attachment).
Now you can see on which lines the subwoofer is likely to cause excessive room modes, even when
it is free standing. Therefore do not place it on any of these lines, least of all on the intersections.
When you have found a location where the bass sweep of the solo subwoofer sounds uniform in the
listening position, adjust the phase position between the subwoofer and the monitor. Now play back
a bass sine tone close to the crossover frequency with the main monitors switched on and rotate the
phase of the subwoofer. The phase position in which the subwoofer sounds the loudest in the
listening position is the correct one.
Now listen to your wonderfully mastered favorite Cd's at 85db spl and adjust the level of the
subwoofer in such a way that you intuitively get the right feel for the bass level. Your monitors
should sound balanced at 85db spl in the bass zone.
If you are dissatisfied with the result, systematically proceed with the measurement microphone and
measurement equipment to find the ideal location for your sub and to calibrate your monitoring
system.
There are extremely varied ways of proceeding. I shall outline the simplest ones here as an
example:
1. Position your subwoofer temporarily in your listening position.
2. Play back bass-heavy music and walk around the room. Find the spot in the studio where the
bass sounds best, in the half of the room where the speakers are located, according to the
rules outlined earlier.
3. Install the subwoofer there.
4. Check the subwoofer's phase position. Send low test signals to the monitors including the
subwoofer which are around the crossover frequency at, for example, 60/80/100/ Hz and
move the phase switch of the subwoofer back and forth. The position where the bass sounds
louder in the listening position is the correct one.
5. Play pink noise on your monitor setup, including the subwoofer. Install a measurement
microphone in the listening position with the tip facing upwards and send the signal to a
good spectrum analyser. Now you can calibrate the level and crossover frequency until the
analyser displays a frequency response which is as linear as possible."
JF
Concernant le placement du sub, j'avais trouvé un jour un chouette document (en anglais), qui met en garde par rapport aux modes de la pièce, l'utilisation de la fréquence de coupure, etc...
Sören Hjalmarsson - Subwoofer Calibration :
"Subwoofer Calibration
Find the optimal crossover frequency, which is usually between 60 to 80 Hz, with the assistance of
bass sweeps. These are tones which are set at a uniform level from 200 to 25 Hz. Pay attention to
resonances in the area of the crossover frequency (only listen to the sweep through the subwoofer at
this point).
The positioning of the subwoofer has a great influence on the standing waves or 'room modes'. A
corner position is the least favorable in this respect, followed by a position against a wall. You have
the greatest chance of a uniform sound when the subwoofer is free standing in the room.
In rooms with parallel walls, a virtual partitioning of your studio into uniform 4 by 4 fields, is a
further assistance in the search for an ideal location. Divide the room length and breath by 4 and
imagine lines on the floor, or mark these lines out temporarily with masking tejp(see attachment).
Now you can see on which lines the subwoofer is likely to cause excessive room modes, even when
it is free standing. Therefore do not place it on any of these lines, least of all on the intersections.
When you have found a location where the bass sweep of the solo subwoofer sounds uniform in the
listening position, adjust the phase position between the subwoofer and the monitor. Now play back
a bass sine tone close to the crossover frequency with the main monitors switched on and rotate the
phase of the subwoofer. The phase position in which the subwoofer sounds the loudest in the
listening position is the correct one.
Now listen to your wonderfully mastered favorite Cd's at 85db spl and adjust the level of the
subwoofer in such a way that you intuitively get the right feel for the bass level. Your monitors
should sound balanced at 85db spl in the bass zone.
If you are dissatisfied with the result, systematically proceed with the measurement microphone and
measurement equipment to find the ideal location for your sub and to calibrate your monitoring
system.
There are extremely varied ways of proceeding. I shall outline the simplest ones here as an
example:
1. Position your subwoofer temporarily in your listening position.
2. Play back bass-heavy music and walk around the room. Find the spot in the studio where the
bass sounds best, in the half of the room where the speakers are located, according to the
rules outlined earlier.
3. Install the subwoofer there.
4. Check the subwoofer's phase position. Send low test signals to the monitors including the
subwoofer which are around the crossover frequency at, for example, 60/80/100/ Hz and
move the phase switch of the subwoofer back and forth. The position where the bass sounds
louder in the listening position is the correct one.
5. Play pink noise on your monitor setup, including the subwoofer. Install a measurement
microphone in the listening position with the tip facing upwards and send the signal to a
good spectrum analyser. Now you can calibrate the level and crossover frequency until the
analyser displays a frequency response which is as linear as possible."
JF
Anonyme
1055
47882 Posté le 19/07/2019 à 14:24:39
[ Dernière édition du message le 19/07/2019 à 14:37:00 ]
kosmix
46280
Ma vie est un thread...
Membre depuis 19 ans
47883 Posté le 19/07/2019 à 15:12:23
Ah Farkey, ça faisait longtemps !
Bel entassement d'électronique, où as-tu caché ton Timbre Wolf
Bel entassement d'électronique, où as-tu caché ton Timbre Wolf
Putain Walter mais qu'est-ce que le Vietnam vient foutre là-dedans ?
marclr17
3896
Squatteur·euse d’AF
Membre depuis 19 ans
47884 Posté le 19/07/2019 à 15:16:12
Sarakyel
2800
Squatteur·euse d’AF
Membre depuis 12 ans
47885 Posté le 19/07/2019 à 15:24:27
Citation de jfherts :
1. Position your subwoofer temporarily in your listening position.
2. Play back bass-heavy music and walk around the room. Find the spot in the studio where the
bass sounds best, in the half of the room where the speakers are located, according to the
rules outlined earlier.
3. Install the subwoofer there.
4. Check the subwoofer's phase position. Send low test signals to the monitors including the
subwoofer which are around the crossover frequency at, for example, 60/80/100/ Hz and
move the phase switch of the subwoofer back and forth. The position where the bass sounds
louder in the listening position is the correct one.
5. Play pink noise on your monitor setup, including the subwoofer. Install a measurement
microphone in the listening position with the tip facing upwards and send the signal to a
good spectrum analyser. Now you can calibrate the level and crossover frequency until the
analyser displays a frequency response which is as linear as possible."
C'est effectivement la méthode recommandée par Neumann et Genelec, qui a toujours très bien fonctionné dans mon cas.
Pour les non-anglophones :
1. Placer temporairement le caisson de basse là où se trouve votre point d'écoute.
2. Diffuser de la musique riche en basses fréquences et se déplacer dans la pièce. Le but est de trouver l'emplacement où les graves sonnent le mieux possible (présentes mais pas résonnantes) dans la même moitié de la pièce que là où les moniteurs ont été placés.
3. Installer le caisson à cet emplacement.
4. Vérifier l'alignement de phase du caisson. Diffuser des signaux de test sur les moniteurs (caisson compris) à une bande de fréquences correspondant au crossover, généralement dans les 60 à 100 Hz, et jouer avec le bouton de réglage de phase du caisson. La position dans laquelle le volume des basses est le plus élevé au point d'écoute est la bonne.
5. Diffuser un bruit rose sur les moniteurs (caisson inclus). Installer un micro de mesure orienté vers le plafond à la position d'écoute et envoyer le signal ainsi capturé vers un analyseur spectral. Régler ensuite le volume du caisson et la fréquence de crossover de façon à obtenir une réponse en fréquence aussi "plate" que possible avec l'analyseur spectral.
[ Dernière édition du message le 19/07/2019 à 15:26:37 ]
Poussin du Ciel
5022
Je poste, donc je suis
Membre depuis 21 ans
47886 Posté le 19/07/2019 à 15:26:03
Tout ce matos ça fait rêver
RandomDude
104
Posteur·euse AFfiné·e
Membre depuis 6 ans
47887 Posté le 19/07/2019 à 15:31:26
Citation :
, jfherts
Citation :
, merci beaucoup pour vos réponses !Sarakyel
Ça à l'air bien beau comme méthode, mais si c'est au beau milieu de la pièce qu'il est le mieux le caisson , je fais comment ?
C'est en forgeant que l'on devient forgeron.
Anonyme
1055
47888 Posté le 19/07/2019 à 15:31:41
Le Timbre Wolf était sympa mais son sequencer interne est foireux, donc dégagé.
La mpc x est le cerveau de mon studio, je ne saurais pas m'en passer !
Nouvelle tour i9-Designare avec une Antelope discrète 8 et un Focusrite Octopre en adat, donc 16 pistes simultanées.
La mpc x est le cerveau de mon studio, je ne saurais pas m'en passer !
Nouvelle tour i9-Designare avec une Antelope discrète 8 et un Focusrite Octopre en adat, donc 16 pistes simultanées.
Poussin du Ciel
5022
Je poste, donc je suis
Membre depuis 21 ans
47889 Posté le 19/07/2019 à 15:32:55
RandomDude tu te sers de caisson comme siège
kosmix
46280
Ma vie est un thread...
Membre depuis 19 ans
47890 Posté le 19/07/2019 à 15:37:18
CQFD
Putain Walter mais qu'est-ce que le Vietnam vient foutre là-dedans ?
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