1 files changed, 33 insertions, 0 deletions
diff --git a/datasets/spread.sh b/datasets/spread.sh
new file mode 100755
index 0000000..60c3551
--- /dev/null
+++ b/datasets/spread.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+
+if [ "$#" -ne 5 ]; then
+    echo "Usage: $0 <in.wav> <out.wav> <rate_min> <rate_step> <rate_max>"
+    exit
+fi
+
+FN_IN=$1
+FN_OUT=$2
+RATE=$3
+STEP=$4
+MAX=$5
+
+ITER=0
+
+while true; do
+  if (( $(echo "$RATE > $MAX" | bc -l) )); then
+    break
+  fi
+  let ITER+=1
+  RATE=`echo "$RATE+$STEP" | bc`
+  if ((ITER % 20 != 0)); then
+    echo "${ITER}... ${RATE}"
+    sleep 1
+  fi
+  sox $FN_IN "tmp_$ITER.wav" speed $RATE
+done
+
+echo "made $ITER copies"
+
+sox tmp_* $FN_OUT
+rm tmp_*
+