manual/configure_rockbox/recording_settings.tex - rockbox - Gitiles

 % $Id:$ %
 \screenshot{main_menu/images/ss-recording-settings}{The recording settings screen}{}

 \opt{MASCODEC}{
   \section{Quality}
     Choose the quality here (0 to 7). Default is 5, best quality is 7,
     smallest file size is 0. This setting effects how much your sound
     sample will be compressed. Higher quality settings result in larger
     MP3 files.

     The quality setting is just a way of selecting an average bit rate,
     or number of  bits per second, for a recording.  When  this setting
     is lowered, recordings are compressed more (meaning worse sound quality),
     and the average bitrate changes as follows.

   \begin{table}[h!]
     \begin{center}
       \begin{tabularx}{0.75\textwidth}{lX}\toprule
         \emph{Frequency} & \emph{Bitrate} (Kbit/s) -- quality 0$\rightarrow$7 \\\midrule
         44100Hz stereo   & 75, 80, 90, 100, 120, 140, 160, 170 \\
         22050Hz stereo   & 39, 41, 45, 50,  60,  80,  110, 130 \\
         44100Hz mono     & 65, 68, 73, 80,  90,  105, 125, 140 \\
         22050Hz mono     & 35, 38, 40, 45,  50,  60,  75,  90 \\\bottomrule
       \end{tabularx}
     \end{center}
   \end{table}
 }

 \opt{SWCODEC}{
   \section{Format}
     Choose which format to save your recording in. The available choices are
     the two uncompressed formats \setting{PCM Wave} and \setting{AIFF}, the
     losslessly compressed \setting{WavPack} and the lossy
     \setting{MPEG Layer 3}.

   \section{Encoder Settings}
     This sets the bitrate when using the \setting{MPEG Layer 3} format. And has
     no settings for the other formats.
 }

   \section{Frequency}
     Choose the recording frequency (sample rate).
     \opt{MASCODEC}{48kHz, 44.1kHz, 32kHz, 24kHz, 22.05kHz, 16kHz}
     \opt{h1xx,h300}{44.1kHz, 22.05kHz and 11.025kHz}
     \opt{x5}{88.2kHz, 44.1kHz, 22.05kHz and 11.025kHz}
     are available. Higher sample rates use up more disk space, but give better
     sound quality.
     \opt{SWCODEC}{\note{The 11.025kHz setting is not available when using%
       \setting{MPEG Layer 3} format.}
     }%
     \opt{MASCODEC}{
       The frequency setting also determines which version of the MPEG standard
       the sound is recorded using:\\
       MPEG v1 for 48, 44.1 and 32\\
       MPEG v2 for 24, 22.05 and 16\\
     }
     \opt{recorder,recorderv2fm,h1xx}
       {\note{You cannot change the sample rate for digital recordings.}
     }

 \section{Source}
   Choose the source of the recording. This can be
   \opt{recorder,recorderv2fm,h1xx}{\setting{SPDIF (digital)},}%
   \setting{Mic} or \setting{Line In}.
   \opt{CONFIG_TUNER}{For recording from the radio see \reference{ref:FMradio}.}

 \section{Channels}
   This allows you to select mono or stereo recording. Please note that
   for mono recording, only the left channel is recorded. Mono recordings
   are usually somewhat smaller than stereo.

 \opt{MASCODEC}{
   \section{Independent Frames}
     The independent frames option tells the \dap{} to encode with the bit
     reservoir disabled, so the frames are independent of each other. This
     makes a file easier to edit.
 }

 \section{File Split Options}
   This sub menu contains options for file splitting, which can be used to split
   up long recordings into manageable pieces. The splits are seamless (frame
   accurate), no audio is lost at the split point. The break between recordings
   is only the time required to stop and restart the recording, on the order of
   2 -- 4 seconds.
   \begin{description}
     \item[Split Measure:]
       This option controls wether to split the recording when the
       \setting{Split Filesize} is reached or when the
       \setting{Split Time} has elapsed.

     \item[What to do when Splitting:]
       This controls what will happend when the splitting condition is
       fullfilled the two available options here are
       \setting{Start a new file} or \setting{Stop recording}.

     \item[Split Time:]
       Set the time to record between each split, if time is used as
       \setting{Split Measure}.\\
       Options (hours:minutes between splits): Off, 00:05, 00:10, 00:15, 00:30,
       1:00, 1:14 (74 minute  CD), 1:20 (80 minute CD), 2:00, 4:00, 8:00, 10:00,
       12:00, 18:00, 24:00.

     \item[Split Filesize:]
       Set the filesize to record between each split, if filesize is used as
       \setting{Split Measure}.

   \end{description}

 \section{Prerecord Time}
     This setting buffers a small amount of audio so that when the record button
     is pressed, the recording will begin from that number of seconds earlier.
     This is useful for ensuring that a recording begins before a cue that is
     being waited for.

 \section{Directory}
     Allows changing the location where the recorded files are saved. The
     default location is \fname{/recordings}. If set to
     \setting{Current Directory} the recorded files will be saved in the
     directory where the \setting{File Browser} was left.

 \nopt{ondio}{
   \section{Clipping Light}
     Causes the backlight to flash on when clipping has been detected.\\
     Options: \setting{Off}, \setting{Main unit only},
     \setting{Main and remote unit}, \setting{Remote unit only}.
 }
   \section{Trigger}
     \fixme{Add description of triggered recording.}

 \opt{h1xx,h300}{%
   \section{Automatic Gain Control}
     The \setting{Automatic Gain Control} has five different presets for
     automatically controlling the gain while recording.
     \begin{description}
       \item[Safety (clip):]
         This preset will lower the gain when the levels get too high (-1dB)
         and will never increase gain.

       \item[Live (slow):]
         This preset is designed to be used for recording of live shows and has
         quite large headroom for loud parts. It heads for a nominal target peak
         level of -9dB and will slowly increase or decrease gain to reach it.

       \item[DJ-Set (slow):]
         This preset heads for a nominal target peak level of -5dB and will
         slowly increase or decrease gain to reach it.

       \item[Medium:]
         This preset heads for a nominal target peak level of -6dB and will
         increase or decrease gain to reach it.

       \item[Voice (fast):]
         This preset is designed to be used for voice recording and heads for a
         nominal target peak level of -7dB and will quickly increase or
         decrease gain to reach it.
     \end{description}

   \section{AGC clip time}
     This setting controls how long the level is too loud or soft before the
     \setting{Automatic Gain Control} kicks in.
 }%
	% $Id:$ %
	\screenshot{main_menu/images/ss-recording-settings}{The recording settings screen}{}

	\opt{MASCODEC}{
	\section{Quality}
	Choose the quality here (0 to 7). Default is 5, best quality is 7,
	smallest file size is 0. This setting effects how much your sound
	sample will be compressed. Higher quality settings result in larger
	MP3 files.

	The quality setting is just a way of selecting an average bit rate,
	or number of bits per second, for a recording. When this setting
	is lowered, recordings are compressed more (meaning worse sound quality),
	and the average bitrate changes as follows.

	\begin{table}[h!]
	\begin{center}
	\begin{tabularx}{0.75\textwidth}{lX}\toprule
	\emph{Frequency} & \emph{Bitrate} (Kbit/s) -- quality 0$\rightarrow$7 \\\midrule
	44100Hz stereo & 75, 80, 90, 100, 120, 140, 160, 170 \\
	22050Hz stereo & 39, 41, 45, 50, 60, 80, 110, 130 \\
	44100Hz mono & 65, 68, 73, 80, 90, 105, 125, 140 \\
	22050Hz mono & 35, 38, 40, 45, 50, 60, 75, 90 \\\bottomrule
	\end{tabularx}
	\end{center}
	\end{table}
	}

	\opt{SWCODEC}{
	\section{Format}
	Choose which format to save your recording in. The available choices are
	the two uncompressed formats \setting{PCM Wave} and \setting{AIFF}, the
	losslessly compressed \setting{WavPack} and the lossy
	\setting{MPEG Layer 3}.

	\section{Encoder Settings}
	This sets the bitrate when using the \setting{MPEG Layer 3} format. And has
	no settings for the other formats.
	}

	\section{Frequency}
	Choose the recording frequency (sample rate).
	\opt{MASCODEC}{48kHz, 44.1kHz, 32kHz, 24kHz, 22.05kHz, 16kHz}
	\opt{h1xx,h300}{44.1kHz, 22.05kHz and 11.025kHz}
	\opt{x5}{88.2kHz, 44.1kHz, 22.05kHz and 11.025kHz}
	are available. Higher sample rates use up more disk space, but give better
	sound quality.
	\opt{SWCODEC}{\note{The 11.025kHz setting is not available when using%
	\setting{MPEG Layer 3} format.}
	}%
	\opt{MASCODEC}{
	The frequency setting also determines which version of the MPEG standard
	the sound is recorded using:\\
	MPEG v1 for 48, 44.1 and 32\\
	MPEG v2 for 24, 22.05 and 16\\
	}
	\opt{recorder,recorderv2fm,h1xx}
	{\note{You cannot change the sample rate for digital recordings.}
	}

	\section{Source}
	Choose the source of the recording. This can be
	\opt{recorder,recorderv2fm,h1xx}{\setting{SPDIF (digital)},}%
	\setting{Mic} or \setting{Line In}.
	\opt{CONFIG_TUNER}{For recording from the radio see \reference{ref:FMradio}.}

	\section{Channels}
	This allows you to select mono or stereo recording. Please note that
	for mono recording, only the left channel is recorded. Mono recordings
	are usually somewhat smaller than stereo.

	\opt{MASCODEC}{
	\section{Independent Frames}
	The independent frames option tells the \dap{} to encode with the bit
	reservoir disabled, so the frames are independent of each other. This
	makes a file easier to edit.
	}

	\section{File Split Options}
	This sub menu contains options for file splitting, which can be used to split
	up long recordings into manageable pieces. The splits are seamless (frame
	accurate), no audio is lost at the split point. The break between recordings
	is only the time required to stop and restart the recording, on the order of
	2 -- 4 seconds.
	\begin{description}
	\item[Split Measure:]
	This option controls wether to split the recording when the
	\setting{Split Filesize} is reached or when the
	\setting{Split Time} has elapsed.

	\item[What to do when Splitting:]
	This controls what will happend when the splitting condition is
	fullfilled the two available options here are
	\setting{Start a new file} or \setting{Stop recording}.

	\item[Split Time:]
	Set the time to record between each split, if time is used as
	\setting{Split Measure}.\\
	Options (hours:minutes between splits): Off, 00:05, 00:10, 00:15, 00:30,
	1:00, 1:14 (74 minute CD), 1:20 (80 minute CD), 2:00, 4:00, 8:00, 10:00,
	12:00, 18:00, 24:00.

	\item[Split Filesize:]
	Set the filesize to record between each split, if filesize is used as
	\setting{Split Measure}.

	\end{description}

	\section{Prerecord Time}
	This setting buffers a small amount of audio so that when the record button
	is pressed, the recording will begin from that number of seconds earlier.
	This is useful for ensuring that a recording begins before a cue that is
	being waited for.

	\section{Directory}
	Allows changing the location where the recorded files are saved. The
	default location is \fname{/recordings}. If set to
	\setting{Current Directory} the recorded files will be saved in the
	directory where the \setting{File Browser} was left.

	\nopt{ondio}{
	\section{Clipping Light}
	Causes the backlight to flash on when clipping has been detected.\\
	Options: \setting{Off}, \setting{Main unit only},
	\setting{Main and remote unit}, \setting{Remote unit only}.
	}
	\section{Trigger}
	\fixme{Add description of triggered recording.}

	\opt{h1xx,h300}{%
	\section{Automatic Gain Control}
	The \setting{Automatic Gain Control} has five different presets for
	automatically controlling the gain while recording.
	\begin{description}
	\item[Safety (clip):]
	This preset will lower the gain when the levels get too high (-1dB)
	and will never increase gain.

	\item[Live (slow):]
	This preset is designed to be used for recording of live shows and has
	quite large headroom for loud parts. It heads for a nominal target peak
	level of -9dB and will slowly increase or decrease gain to reach it.

	\item[DJ-Set (slow):]
	This preset heads for a nominal target peak level of -5dB and will
	slowly increase or decrease gain to reach it.

	\item[Medium:]
	This preset heads for a nominal target peak level of -6dB and will
	increase or decrease gain to reach it.

	\item[Voice (fast):]
	This preset is designed to be used for voice recording and heads for a
	nominal target peak level of -7dB and will quickly increase or
	decrease gain to reach it.
	\end{description}

	\section{AGC clip time}
	This setting controls how long the level is too loud or soft before the
	\setting{Automatic Gain Control} kicks in.
	}%