Differences

This shows you the differences between two versions of the page.

--- camera_help_cc [2021/01/10 20:50] – Walter Schulz
+++ camera_help_cc [2021/01/10 20:54] (current) – Walter Schulz
@@ Line 32: / Line 32: @@
 >And what is the difference between Luma and Luma Fast?
-{{page>camera_help_cc:audio&nofooter}}
+====== Audio ======
+> Complete (18.02.2019). No pics for plugs, etc. here, because it's in-camera help and drawings for soldering doesn't help that much in this respect, IMO.
+> And if Audio screen isn't visible this help text won't be able to tell users why. That's one reason I opted for this screen to be visible at all times.
+Manual audio controls.\\ If you do not see this screen check these conditions:
+  * 50D: Nope, no way to make it happen! 50D doesn't support audio recording.
+  * Your cam may have restricted audio menu after loading module MLV_SND.mo:\\ 1100D, 650D, 6D, 700D, EOS M, 100D, 70D, EOS M2, 1200D\\ The only menu option you will see with MLV_SND active:\\ - MLV Sound
+The options available differ a lot depending on your camera type.\\ Please check [[https://builds.magiclantern.fm/features.html#Audio|feature matrix]]
+===== Analog Gain =====
+Gain applied to both inputs in the analog domain. Default is on and 23 dB.
+//Values://
+**0**-32 **dB** (values: 0, 10, 17-32 in 3 dB steps)
+Analog does a great job of boosting the signal while retaining a low noise
+floor and hence, [[http://www.magiclantern.fm/forum/index.php?topic=8549.0|dynamic range.]] If you use an
+external preamp, set this parameter as low as possible otherwise, set it
+as high as possible without [[http://www.magiclantern.fm/forum/index.php?topic=11063.0|clipping]] (audio meters
+should be green).
+===== Digital Gain =====
+In-camera digital gain. Default is 0, 0, OFF
+//Submenu options://
+==== Left Digital Gain ====
+to 36 dB
+==== Right Digital Gain ====
+to 36 dB
+==== AGC ====
+**OFF**/ON
+Applying digital gain in-camera is not recommended as any non-zero value reduces
+audio quality and you can achieve the same effect with more control in
+post, but it can serve as an evaluative tool on set. You can apply
+digital gain in 6dB increments to the left and right channel
+independently. AGC is auto mode and is applied only in digital domain.
+It overrides digital gains, but you can still adjust analog gain.
+===== Input source =====
+Mic configurations.
+//Values://
+**Internal mic** your camera's internal mic(s)
+**L:int R:ext**
+**External stereo**
+**L:int R:balanced** (internal mic on Left, external mic on Right from both external pins as balanced audio)
+**Auto int/ext** camera detects if a mic is plugged in. Int is dual mono, ext is stereo.
+Balanced audio allows for very long cable runs without interference. Usually
+balanced mics have three pin XLR connectors and it is very easy to put
+together an XLR to Canon mic input cable. Balanced allows us to use such
+pro mics with our little Canons and this is a very welcome surprise for
+audio guys. You can feed an [[http://www.magiclantern.fm/forum/index.php?topic=1944.0|external audio source]] into the
+camera giving you the option of using higher quality mics, although this
+is not [[http://www.magiclantern.fm/forum/index.php?topic=8836.0|straight forward.]]
+===== Wind Filter =====
+Digital high-pass filter.
+//Values://
+**On or Off**
+Canon's audio controls have no effect, they are completely overriden by ML and
+the wind filter has been known to mute external mics, so if you're
+having that problem on an earlier build turn it off. [[http://www.magiclantern.fm/forum/index.php?topic=4234.msg27693#msg27693|To use or not?]]
+Also see [[http://www.akm.com/akm/en/file/datasheet/AK4646EN.pdf|AK4646 datasheet p.34.]]
+===== Mic Power =====
+Power for mics.
+//Values://
+**ON** input impedance is 2 kOhm.
+**OFF** input impedance is 30 kOhm.
+Required for internal mic and certain types of external mics, but it reduces
+input impedance. This setting is always ON when input source is either
+internal mic or L:int R:ext. See[[http://www.akm.com/akm/en/file/datasheet/AK4646EN.pdf| AK4646 datasheet p.31.]] and the Mic
+power control thread. [[http://www.magiclantern.fm/forum/index.php?topic=2666.0|Results of audio tests with ML and Canon 550D, T2i.]]
+===== Headphone Mon. =====
+Audio monitoring with headphones, using the A/V cable.
+//Values://
+**On or Off**
+To use audio monitoring, you need a special cable: your Canon A/V cable
+with a RCA - 3.5mm jack adapter a dedicated cable from Sescom or you may
+solder it yourself (you will have to cut your A/V cable). Mobile phone
+cables will not work; even if the connector looks similar, it's not
+identical. You must use the original cable which came with your camera.
+For details, see Audio monitoring HOWTO on Vimeo group. Disable this
+setting if you are using a SD monitor. This feature is not available on
+D/T3i.
+Tip: Before cuting/soldering or ordering a monitoring cable check [[https://builds.magiclantern.fm/features.html#Audio|feature matrix]] if this feature is available for your cam at all.
+===== Headphone volume =====
+Digital output gain for audio monitoring.
+//Values://
+**0-6 dB** in 2 dB increments.
+It does not have any effect on the internal camera speaker. For best
+results, you should a pair of low impedance headphones, for example
+Audio Technica ATH-M50 (38 ohms). With high-impedance headphones, you
+may have to use a headphone amplifier like FiiO E5.
+===== Audio Meters =====
+Display the input audio level.
+//Values://
+From -40dB to 0dB, meters become yellow at -12 dB and red at -3 dB. Audio meters are only displayed in movie mode.
+===== Speaker Volume =====
+In-camera speaker.
+//Values://
+**1 to 5**
+===== Beep, test tones =====
+Customize camera sounds.
+//Submenu options://
+==== Enable Beeps ====
+ML uses beep tones for several events. Turn them off if you have to go silent.
+==== Tone Waveform ====
+Sine tones of lower frequency might be not audible on the internal speaker. Use square. Always check with Test beep sound.
+==== Tone Frequency ====
+Default is 1 kHz. Range from 55 Hz (A1) to 12 kHz. Human ears are considered to be most sensitive between 2 and 5 kHz.
+==== Play test tone ====
+==== Test beep sound ====
+===== MLV Sound ======
+Only available when the [[#mlv_sndmo|MLV_SND]] module is loaded and active. See
+[[#modules|Modules]]
+//Submenu options://
+==== Sampling rate ====
+- 48kHz the basic quality of your audio, the higher the better.
+==== Trace output ====
+ON or OFF
+When MLV Sound is ON, a separate WAV file is generated at the framerate
+determined by your FPS setting in Canon Menu. When FPS Override is used,
+only the framerate of raw video is affected, the WAV file will remain
+either 24fps or 30fps depending on the FPS setting in canon menu. It is
+not possible to playback mlv sound in-camera.
 ====== Expo ======