audio: fix typos

Signed-off-by: Alexandre Belloni <[email protected]>

slides/audio-alsa-lib/audio-alsa-lib.tex

@@ -43,7 +43,7 @@ \subsection{alsa-lib}
   \item This can be specified as a hardware device. The three
     arguments (in order: CARD,DEV,SUBDEV) specify card number or
     identifier, device number and subdevice number (-1 means any). For
-    example: \code{hw:0} or \code{hw:1,0}. Instea of the index, the
+    example: \code{hw:0} or \code{hw:1,0}. Instead of the index, the
     card name can be used: \code{hw:STM32MP15DK,0}
   \item Or through the \code{plug} plugin: \code{plug:mypcmdef},
     \code{plug:hw:0,0}.

slides/audio-asoc-cpu/audio-asoc-cpu.tex

@@ -83,7 +83,7 @@ \subsection{CPU DAI driver}
   \begin{itemize}
   \item When a peripheral DMA controller is used, this is more
     complex.
-  \item The driver will have to handle all th aspects of the PCM
+  \item The driver will have to handle all the aspects of the PCM
     stream life cycle.
   \item Understandable example in \kfile{sound/soc/atmel/atmel-pcm-pdc.c}
   \end{itemize}

slides/audio-debugging/audio-debugging.tex

@@ -3,7 +3,7 @@ \section{Troubleshooting}
 \begin{frame}{Troubleshooting: no sound}
   Audio seems to play for the correct duration but there is no sound:
   \begin{itemize}
-  \item Unmute \code{Master} and the relevant widgets
+  \item Unmute \code{Master} and the relevant controls
   \item Turn up the volume
   \item Check the codec analog muxing and mixing (use alsamixer)
   \item Check the amplifier configuration
@@ -60,7 +60,7 @@ \section{Troubleshooting}
 
 \begin{frame}{Troubleshooting: going further}
   \begin{itemize}
-  \item Use \code{speaker-test} to generate audio an play tones.
+  \item Use \code{speaker-test} to generate audio and play tones.
   \item Be careful with the 440Hz tone, it may not expose all the
     errors. Rather play something that is not commonly divisible (e.g.
     441Hz)

slides/audio-regmap/audio-regmap.tex

@@ -88,7 +88,7 @@ \subsection{regmap}
   \item \code{writeable_reg}, \code{readable_reg},
     \code{volatile_reg}, \code{precious_reg}: Optional callbacks
     returning true if the register is writeable, readable, volatile or
-    precious. volatile registers wont be cached. precious registers
+    precious. volatile registers won't be cached. precious registers
     will not be read unless the driver explicitly calls a read
     function. There are also tables in the \code{struct regmap_config}
     for the same purpose.

slides/audio-sound/audio-sound.tex

@@ -68,15 +68,15 @@ \section{Sound and its representation}
   \item The sample size, in bits, then defines the resolution.
   \item Common sample sizes are 16 and 24 bits.
   \item 8 bits is getting very rare due to the poor audio quality and
-    32 bits samples can be used when specific alignment is required
+    32 bits samples can be used when specific alignment is required.
   \end{itemize}
 \end{frame}
 
 \begin{frame}{Sound digitization - sample format}
   There are multiple ways to store samples in memory or on disk:
   \begin{itemize}
   \item as signed integers
-  \item as unsigned integer
+  \item as unsigned integers
   \item as floating points
   \end{itemize}
   Also, they can be stored in little-endian or big-endian order.
@@ -90,7 +90,7 @@ \section{Sound and its representation}
   \item We can then store sound as a sequence of samples and the
     specific sample rate that was used.
   \item This method is called Linear Pulse-code modulation or LPCM.
-  \item A sampling rate of 40~kHz is needed.
+  \item A sampling rate of about 40kHz is needed.
   \end{itemize}
 \end{frame}
 
@@ -108,7 +108,7 @@ \section{Sound and its representation}
     17-20 & 16 & Length of format data, 16 for PCM \\
     21-22 & 1 & Audio format, 1 for PCM \\
     23-24 & 2 & Number of channels \\
-    25-28 & 44800 & Sample rate \\
+    25-28 & 48000 & Sample rate \\
     29-32 & 176400 & Byte rate = (Sample rate * BitsPerSample * channels) / 8. \\
     33-34 & 4 & BlockAlign = (BitsPerSample * Channels) / 8 \\
     35-36 & 16 & Bits per sample \\