Merge pull request #12 from cesarsouza/patch-2

Update README.md

README.md

@@ -16,7 +16,7 @@ Files are named in the following format:
 Example: `7_jackson_32.wav`
 
 ### Contributions
-Please contribute your homemade recordings. All recordings should be 8kHz `wav ` files and be trimmed to have minimal silence. Don't forget to update `metadata.py` with the speaker meta-data.
+Please contribute your homemade recordings. All recordings should be mono 8kHz `wav ` files and be trimmed to have minimal silence. Don't forget to update `metadata.py` with the speaker meta-data.
 
 To add your data, follow the recording instructions in `acquire_data/say_numbers_prompt.py`
 and then run `split_and_label_numbers.py` to make your files.