Fix misc. source comment typos

app/audio/audiovisualwaveform.cpp

@@ -287,7 +287,7 @@ void ExpandMinMaxChannel(float *a, int start, int length, float &min_val, float
   __m128 min = _mm_loadu_ps(a + start);
 
   // loop over 'a' and compare current elements with min and max 4 by 4.
-  // we need to make sure we don't read out of boundaries should 'a' lenght be not mod. 4
+  // we need to make sure we don't read out of boundaries should 'a' length be not mod. 4
   for(int i = 4; i < length-4; i+=4) {
     __m128 cur = _mm_loadu_ps(a + start + i);
     max = _mm_max_ps(max, cur);

app/codec/ffmpeg/ffmpegencoder.cpp

@@ -69,7 +69,7 @@ std::vector<AudioParams::Format> FFmpegEncoder::GetSampleFormatsForCodec(ExportC
   if (c == ExportCodec::kCodecPCM) {
     // FFmpeg lists these as separate codecs so we need custom functionality here
     // We list signed 16 first because ExportDialog will always use the first element by default
-    // (beacuse first element is the "default" in FFmpeg)
+    // (because first element is the "default" in FFmpeg)
     f = {
       AudioParams::kFormatSigned16Packed,
       AudioParams::kFormatUnsigned8Packed,