diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
index 42440d93b4..e9020b30d5 100644
--- a/doc/ffmpeg.texi
+++ b/doc/ffmpeg.texi
@@ -1697,18 +1697,6 @@ The default is -1.1. One possible usecase is to avoid framedrops in case
 of noisy timestamps or to increase frame drop precision in case of exact
 timestamps.
 
-@item -async @var{samples_per_second}
-Audio sync method. "Stretches/squeezes" the audio stream to match the timestamps,
-the parameter is the maximum samples per second by which the audio is changed.
--async 1 is a special case where only the start of the audio stream is corrected
-without any later correction.
-
-Note that the timestamps may be further modified by the muxer, after this.
-For example, in the case that the format option @option{avoid_negative_ts}
-is enabled.
-
-This option has been deprecated. Use the @code{aresample} audio filter instead.
-
 @item -adrift_threshold @var{time}
 Set the minimum difference between timestamps and audio data (in seconds) to trigger
 adding/dropping samples to make it match the timestamps. This option effectively is
diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index 69716de6b6..f84701ec75 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -1048,7 +1048,7 @@ static void do_audio_out(OutputFile *of, OutputStream *ost,
     if (!check_recording_time(ost))
         return;
 
-    if (frame->pts == AV_NOPTS_VALUE || audio_sync_method < 0)
+    if (frame->pts == AV_NOPTS_VALUE)
         frame->pts = ost->sync_opts;
     ost->sync_opts = frame->pts + frame->nb_samples;
 
diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h
index ede0b2bd96..8acc83e92a 100644
--- a/fftools/ffmpeg.h
+++ b/fftools/ffmpeg.h
@@ -656,7 +656,6 @@ extern float audio_drift_threshold;
 extern float dts_delta_threshold;
 extern float dts_error_threshold;
 
-extern int audio_sync_method;
 extern enum VideoSyncMethod video_sync_method;
 extern float frame_drop_threshold;
 extern int do_benchmark;
diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
index 17928cea2c..82abb38a93 100644
--- a/fftools/ffmpeg_filter.c
+++ b/fftools/ffmpeg_filter.c
@@ -892,16 +892,6 @@ static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
     last_filter = filt_ctx;                                                 \
 } while (0)
 
-    if (audio_sync_method > 0) {
-        char args[256] = {0};
-
-        av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
-        av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
-        if (!fg->reconfiguration)
-            av_strlcatf(args, sizeof(args), ":first_pts=0");
-        AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
-    }
-
     snprintf(name, sizeof(name), "trim for input stream %d:%d",
              ist->file_index, ist->st->index);
     if (copy_ts) {
diff --git a/fftools/ffmpeg_mux.c b/fftools/ffmpeg_mux.c
index b781e1f5a6..395f7cc89f 100644
--- a/fftools/ffmpeg_mux.c
+++ b/fftools/ffmpeg_mux.c
@@ -102,8 +102,7 @@ static int write_packet(OutputFile *of, OutputStream *ost, AVPacket *pkt)
         goto fail;
     }
 
-    if ((st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && ost->vsync_method == VSYNC_DROP) ||
-        (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
+    if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && ost->vsync_method == VSYNC_DROP)
         pkt->pts = pkt->dts = AV_NOPTS_VALUE;
 
     if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index 5febe319e4..8f57b699f1 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -157,7 +157,6 @@ float audio_drift_threshold = 0.1;
 float dts_delta_threshold   = 10;
 float dts_error_threshold   = 3600*30;
 
-int audio_sync_method = 0;
 enum VideoSyncMethod video_sync_method = VSYNC_AUTO;
 float frame_drop_threshold = 0;
 int do_benchmark      = 0;
@@ -3910,8 +3909,6 @@ const OptionDef options[] = {
         "set video sync method globally; deprecated, use -fps_mode", "" },
     { "frame_drop_threshold", HAS_ARG | OPT_FLOAT | OPT_EXPERT,      { &frame_drop_threshold },
         "frame drop threshold", "" },
-    { "async",          HAS_ARG | OPT_INT | OPT_EXPERT,              { &audio_sync_method },
-        "audio sync method", "" },
     { "adrift_threshold", HAS_ARG | OPT_FLOAT | OPT_EXPERT,          { &audio_drift_threshold },
         "audio drift threshold", "threshold" },
     { "copyts",         OPT_BOOL | OPT_EXPERT,                       { &copy_ts },
