I still do not get this. Here is an example. I made a test recording. I went into Amplification in the Effects Menu. It provided the following information:
Amplification DB 0.0 amplification DB slider 50 New Peak Amplitude DB 0Because 0.0 appeared in the first box, I inferred that no change was required. Where does this 6 DB come in? If I change the first box to 6 DB, the OK option disappears, I infer that is because Allow Clipping is unchecked. Please explain.
Allow Clipping checkbox unchecked Rich De Steno On 4/17/2013 12:28 PM, David Bailes wrote:
Hi Gale, I don't think there's a typo in that section of the Jaws guide. My suggestion is to adjust the input volume so that if you do a short test recording, select the audio, and open the Amplify effect dialog, then the value in the amplification edit box is about 6 db, so indicating that the max amplitude in the recording is about -6 db.David.----- Original Message ----- From: Gale Andrews <gale@xxxxxxxxxxxxxxxx> To: audacity4blind@xxxxxxxxxxxxx Cc: Sent: Tuesday, 16 April 2013, 22:20 Subject: [audacity4blind] Re: Using Amplify in the Effects Menu | From Rich De Steno <ironrock@xxxxxxxxxxx> | Tue, 16 Apr 2013 08:52:30 -0400 | Subject: [audacity4blind] Using Amplify in the Effects MenuI was under the impression that if you go into the amplify option under the effects menu with a sound file loaded into Audacity, the first item that comes up indicates how much change in volume is needed for optimal sound.The first item "Amplification (dB)" indicates the amplification change required (if any) to make the peak volume 0 dB (as loud as it can be without clipping). A peak level of 0 dB doesn't necessarily mean "optimal sound". 0 dB could sound "too loud" in a heavily compressed pop song.Thus, I thought that if it stated 0.0, then no change was necessary. However, the below excerpt from the Audacity Jaws Users manual seems to indicate otherwise, apparently stating that the number should be changed to 6. So should that first number be changed to 6 as this seems to state?Unfortunately there is a typo in that JAWS guide. It is probably trying to say that -6 dB (not 6 dB) is a good value to aim for in the "New Peak Amplitude (dB)" box (the second box). Certainly the official Audacity Manual suggests that you should set the input level so that you record at about -6 dB (for the reasons David states). However that advice is only relevant to setting the input level. Sighted users would gauge the input level "live" while recording was in progress by using Meter Toolbar. When you are deciding how much to amplify an existing audio file, aiming for a "New Peak Amplitude" of "-0.0 dB" (which happens if you just press ENTER after opening the effect) is much better advice than aiming for -6 dB. However many people these days prefer aiming for a "New Peak Amplitude" of -1 dB. This is the default level to which Effect > Normalize amplifies. This gives a little leeway to speaker systems that may distort at the maximum 0 dB. Gale(excerpt from manual) If you select some audio, and then open the Amplify dialog on the Effects menu, then the initial focus is on an Amplification edit box. The initial value in this edit box is the amount of amplification in decibels needed so that the recording uses the full dynamic range, and it indicates if you need to change the value of the input volume. Normally a good value to aim for if about 6db. This should ensure that the recording level is both low enough so that distortion or clipping doesn't occur, and high enough so that you don't get an unnecessary amount of noise. So if the value's less than about 6, try lowering the volume, and if it's more than about 6, try increasing the volume.The audacity4blind web site is at //www.freelists.org/webpage/audacity4blind Subscribe and unsubscribe information, message archives, Audacity keyboard commands, and more... To unsubscribe from audacity4blind, send an email to audacity4blind-request@xxxxxxxxxxxxx with subject line unsubscribe The audacity4blind web site is at //www.freelists.org/webpage/audacity4blind Subscribe and unsubscribe information, message archives, Audacity keyboard commands, and more... To unsubscribe from audacity4blind, send an email to audacity4blind-request@xxxxxxxxxxxxx with subject line unsubscribe
The audacity4blind web site is at //www.freelists.org/webpage/audacity4blind Subscribe and unsubscribe information, message archives, Audacity keyboard commands, and more... To unsubscribe from audacity4blind, send an email to audacity4blind-request@xxxxxxxxxxxxx with subject line unsubscribe
