>From the mailing list:
In Liquidsoap 1.3.6, the
"liq_amplify" annotation works as expected: the track level is
increased by exactly the amount given, whether or not the playlist is
passed through the crossfade function.
But in Liquidsoap 1.4.0-alpha1, the "liq_amplify" annotation, if
present, appears to result in much more gain than what is specified.
If it is absent, or set to 0, there is no change in gain.
Here is my test playlist of three short tracks. Each is recorded
quietly, so each requires an amount of gain. These are three extreme
examples, but all are measured properly.
```
annotate:liq_cue_in="0.000",liq_start_next="5.560",duration="312.060",liq_amplify="8.000dB":/home/john/src/radio/mez/204-zoot_sims-blue_room.PbTVdK.mka
annotate:liq_cue_in="0.800",liq_start_next="9.140",duration="286.840",liq_amplify="8.200dB":/home/john/src/radio/mez/02
Cha Cha Loco.FKMSrM.mka
annotate:liq_cue_in="0.100",liq_start_next="5.280",duration="162.080",liq_amplify="8.100dB":/home/john/src/radio/mez/12.Song
to Woody.wOgkma.mka
```
These two lines under the release version produce correct results:
```
myplaylist = amplify(override="liq_amplify", 1.0,
cue_cut(playlist(length=60.0, mode="normal",
"/home/john/src/radio/cha.m3u8")))
myplaylist = crossfade(fade_out=0.01, fade_in=0.01, conservative=true,
myplaylist)
```
But under 1.4.0-alpha1, the addition of the second line produces way
too much gain. Under 1.3.6, it produces the correct amount of gain.
When I did the tests, the "Overriding amplification" notes appeared. The
numbers seemed right, but they appeared three times. Under version 1.3.6, they
appear only once.
e.g., in version 1.4.0:
```
2019/02/03 08:49:59 [cha(dot)m3u8:3] Prepared
"/home/john/src/radio/mez/204-zoot_sims-blue_room.PbTVdK.mka" (RID 2).
2019/02/03 08:49:59 [fallback_10413:3] Switch to cross_10408 with transition.
2019/02/03 08:49:59 [single_10392:4] Activations changed: static=[],
dynamic=[fallback_10413:Music_Too:Music_Too].
2019/02/03 08:49:59 [cross_10408:4] Activations changed:
static=[fallback_10413:Music_Too:Music_Too],
dynamic=[fallback_10413:Music_Too:Music_T
oo].
2019/02/03 08:49:59 [cross_10408:4] Buffering end of track...
2019/02/03 08:49:59 [amplify_10399:3] Overriding amplification: 2.511886.
2019/02/03 08:49:59 [amplify_10399:4] Fading in..
2019/02/03 08:49:59 [fade(dot)in:3] Overriding amplification: 2.511886.
2019/02/03 08:49:59 [fade(dot)in:4] Fading out with 0.0s remaining..
2019/02/03 08:49:59 [fade(dot)out:3] Overriding amplification: 2.511886.
2019/02/03 08:49:59 [decoder:4] Trying method "META" for
"/home/john/src/radio/mez/02 Cha Cha Loco.FKMSrM.mka"...
2019/02/03 08:49:59 [decoder:4] Trying method "WAV" for
"/home/john/src/radio/mez/02 Cha Cha Loco.FKMSrM.mka"...
```
The log above was made during severe distortion on the tracks amplified. Taking
out the amplification, or the cross-fade, resulted in no distortion.
Normally, the "Overriding amplification" notices appear only once. Here's the
last few minutes of my present log using version 1.3.6:
```
2019/02/07 17:29:13 [amplify_10226:3] Overriding amplification: 0.749894.
2019/02/07 17:29:13 [decoder:3] Method "FFMPEG" accepted
"/home/john/src/radio/mez/08. barrion nuevo.nHoocd.mka".
2019/02/07 17:33:26 [test-nodup-shuf-processed(dot)m3u8:3] Finished with
"/home/john/src/radio/mez/Orinoco_Flow_Enya.SjoVpS.mka".
2019/02/07 17:33:26 [amplify_10226:3] End of the current overriding.
2019/02/07 17:33:26 [test-nodup-shuf-processed(dot)m3u8:3] Prepared
"/home/john/src/radio/mez/08. barrion nuevo.nHoocd.mka" (RID 3).
2019/02/07 17:33:26 [amplify_10226:3] Overriding amplification: 1.035142.
2019/02/07 17:33:27 [decoder:3] Method "FFMPEG" accepted
"/home/john/src/radio/mez/01 Tuane.MMCDIy.mka".
2019/02/07 17:36:01 [server:3] New client: 127.0.0.1.
2019/02/07 17:36:01 [server:3] Client 127.0.0.1 disconnected.
2019/02/07 17:36:01 [decoder:3] Method "FFMPEG" accepted
"/home/john/src/radio/bbcuknews.mka".
2019/02/07 17:39:17 [test-nodup-shuf-processed(dot)m3u8:3] Finished with
"/home/john/src/radio/mez/08. barrion nuevo.nHoocd.mka".
2019/02/07 17:39:17 [amplify_10226:3] End of the current overriding.
2019/02/07 17:39:17 [override:3] Prepared "/home/john/src/radio/bbcuknews.mka"
(RID 5).
2019/02/07 17:39:17 [fallback_10229:3] Switch to override with forgetful
transition.
2019/02/07 17:42:19 [override:3] Finished with
"/home/john/src/radio/bbcuknews.mka".
2019/02/07 17:42:19 [test-nodup-shuf-processed(dot)m3u8:3] Prepared
"/home/john/src/radio/mez/01 Tuane.MMCDIy.mka" (RID 4).
2019/02/07 17:42:19 [fallback_10229:3] Switch to amplify_10226 with forgetful
transition.
2019/02/07 17:42:19 [amplify_10226:3] Overriding amplification: 0.749894.
```
--
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/savonet/liquidsoap/issues/717
_______________________________________________
Savonet-users mailing list
Savonet-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/savonet-users
