manual/configure_rockbox/recording_settings.tex

   1 % $Id:$ %
   2 \screenshot{main_menu/images/ss-recording-settings}{The recording settings screen}{}
   3
   4 \note{To change the location where recordings are stored open the
   5       \setting{Context Menu} (see \reference{ref:Contextmenu}) on the directory
   6       where you want to store them in the \setting{File Browser} and select
   7       \setting{Set As Recording Directory}.}
   8
   9 \opt{MASCODEC}{
  10   \section{Quality}
  11     Choose the quality here (0 to 7). Default is 5, best quality is 7,
  12     smallest file size is 0. This setting effects how much your sound
  13     sample will be compressed. Higher quality settings result in larger
  14     MP3 files.
  15
  16     The quality setting is just a way of selecting an average bit rate,
  17     or number of  bits per second, for a recording.  When  this setting
  18     is lowered, recordings are compressed more (meaning worse sound quality),
  19     and the average bitrate changes as follows.
  20
  21   \begin{table}[h!]
  22     \begin{center}
  23       \begin{tabularx}{0.75\textwidth}{lX}\toprule
  24         \emph{Frequency} & \emph{Bitrate} (Kbit/s) -- quality 0$\rightarrow$7 \\\midrule
  25         44100Hz stereo   & 75, 80, 90, 100, 120, 140, 160, 170 \\
  26         22050Hz stereo   & 39, 41, 45, 50,  60,  80,  110, 130 \\
  27         44100Hz mono     & 65, 68, 73, 80,  90,  105, 125, 140 \\
  28         22050Hz mono     & 35, 38, 40, 45,  50,  60,  75,  90 \\\bottomrule
  29       \end{tabularx}
  30     \end{center}
  31   \end{table}
  32 }
  33
  34 \opt{swcodec}{
  35   \section{Format}
  36     Choose which format to save your recording in. The available choices are
  37     the two uncompressed formats \setting{PCM Wave} and \setting{AIFF}, the
  38     losslessly compressed \setting{WavPack} and the lossy
  39     \setting{MPEG Layer 3}.
  40
  41   \section{Encoder Settings}
  42     This sets the bitrate when using the \setting{MPEG Layer 3} format. And has
  43     no settings for the other formats.
  44 }
  45
  46   \section{Frequency}
  47    \nopt{e200}{
  48     Choose the recording frequency (sample rate).
  49     \opt{MASCODEC}{48kHz, 44.1kHz, 32kHz, 24kHz, 22.05kHz, 16kHz}
  50     \opt{h1xx,h300}{44.1kHz, 22.05kHz and 11.025kHz}
  51     \opt{x5}{88.2kHz, 44.1kHz, 22.05kHz and 11.025kHz}
  52     are available. Higher sample rates use up more disk space, but give better
  53     sound quality.
  54     \opt{swcodec}{\note{The 11.025kHz setting is not available when using%
  55       \setting{MPEG Layer 3} format.}
  56     }%
  57     \opt{MASCODEC}{
  58       The frequency setting also determines which version of the MPEG standard
  59       the sound is recorded using:\\
  60       MPEG v1 for 48, 44.1 and 32\\
  61       MPEG v2 for 24, 22.05 and 16\\
  62     }
  63     \opt{recorder,recorderv2fm,h1xx}
  64       {\note{You cannot change the sample rate for digital recordings.}
  65     }
  66    } % nopt e200
  67    \opt{e200}{
  68        Recordings can only be made at a 22.05kHz frequency (sample rate)
  69          on this \dap.
  70     } % opt e200
  71
  72 \section{Source}
  73   Choose the source of the recording. This can be
  74   \opt{recorder,recorderv2fm,h1xx}{\setting{SPDIF (digital)},}%
  75   \setting{Mic} or \setting{Line In}.
  76   \opt{radio}{For recording from the radio see \reference{ref:FMradio}.}
  77
  78 \section{Channels}
  79   This allows you to select mono or stereo recording. Please note that
  80   for mono recording, only the left channel is recorded. Mono recordings
  81   are usually somewhat smaller than stereo.
  82
  83 \opt{MASCODEC}{
  84   \section{Independent Frames}
  85     The independent frames option tells the \dap{} to encode with the bit
  86     reservoir disabled, so the frames are independent of each other. This
  87     makes a file easier to edit.
  88 }
  89
  90 \section{File Split Options}
  91   This sub menu contains options for file splitting, which can be used to split
  92   up long recordings into manageable pieces. The splits are seamless (frame
  93   accurate), no audio is lost at the split point. The break between recordings
  94   is only the time required to stop and restart the recording, on the order of
  95   2 -- 4 seconds.
  96   \begin{description}
  97     \item[Split Measure:]
  98       This option controls wether to split the recording when the
  99       \setting{Split Filesize} is reached or when the
 100       \setting{Split Time} has elapsed.
 101
 102     \item[What to do when Splitting:]
 103       This controls what will happend when the splitting condition is
 104       fullfilled the two available options here are
 105       \setting{Start a new file} or \setting{Stop recording}.
 106
 107     \item[Split Time:]
 108       Set the time to record between each split, if time is used as
 109       \setting{Split Measure}.\\
 110       Options (hours:minutes between splits): Off, 00:05, 00:10, 00:15, 00:30,
 111       1:00, 1:14 (74 minute  CD), 1:20 (80 minute CD), 2:00, 4:00, 8:00, 10:00,
 112       12:00, 18:00, 24:00.
 113
 114     \item[Split Filesize:]
 115       Set the filesize to record between each split, if filesize is used as
 116       \setting{Split Measure}.
 117
 118   \end{description}
 119
 120 \section{Prerecord Time}
 121     This setting buffers a small amount of audio so that when the record button
 122     is pressed, the recording will begin from that number of seconds earlier.
 123     This is useful for ensuring that a recording begins before a cue that is
 124     being waited for.
 125
 126 \section{Clear Recording Directory}
 127     Resets the location where the recorded files are saved to the root of your
 128     \daps{} drive.
 129
 130 \nopt{ondio}{
 131   \section{Clipping Light}
 132     Causes the backlight to flash on when clipping has been detected.\\
 133     Options: \setting{Off}, \setting{Main unit only},
 134     \setting{Main and remote unit}, \setting{Remote unit only}.
 135 }
 136   \section{Trigger}
 137     \fixme{Add description of triggered recording.}
 138
 139 \opt{h1xx,h300}{%
 140   \section{Automatic Gain Control}
 141     The \setting{Automatic Gain Control} has five different presets for
 142     automatically controlling the gain while recording.
 143     \begin{description}
 144       \item[Safety (clip):]
 145         This preset will lower the gain when the levels get too high (-1dB)
 146         and will never increase gain.
 147
 148       \item[Live (slow):]
 149         This preset is designed to be used for recording of live shows and has
 150         quite large headroom for loud parts. It heads for a nominal target peak
 151         level of -9dB and will slowly increase or decrease gain to reach it.
 152
 153       \item[DJ-Set (slow):]
 154         This preset heads for a nominal target peak level of -5dB and will
 155         slowly increase or decrease gain to reach it.
 156
 157       \item[Medium:]
 158         This preset heads for a nominal target peak level of -6dB and will
 159         increase or decrease gain to reach it.
 160
 161       \item[Voice (fast):]
 162         This preset is designed to be used for voice recording and heads for a
 163         nominal target peak level of -7dB and will quickly increase or
 164         decrease gain to reach it.
 165     \end{description}
 166
 167   \section{AGC clip time}
 168     This setting controls how long the level is too loud or soft before the
 169     \setting{Automatic Gain Control} kicks in.
 170 }%