Panda Music Player is a grace music player which following the google material design. It is also a free app creates ringtone, alarms, and notifications from FLAC, MP3, WAV,AAC/MP4, 3GPP/AMR, OGG files. You can set the start and ending points by sliding arrows along the timeline, by pressing Start and End to record the point, or by typing in time stamps.
With advanced features like fading in/out for MP3, adjusting volume, and share by e-mail. You can even also copy, cut and paste.

Features:
Material design
Browse Songs, Albums, Artists
Create and edit playlists
Homescreen widgets
Browse device folders
Dark theme and UI customisability
Copy, cut and paste.
Fade in/out for mp3.
Adjust volume for mp3.
Preview the Ringtone files and assign to contact.
View a scrollable waveform representation of the audio file at 6 zoom levels.
Set starting and ending points for a clip within the audio file, using an optional touch interface.
Play the selected portion of the audio, including an indicator cursor and auto scrolling of the waveform.
Play anywhere else by tapping the screen.
Save the clipped audio as a new audio file and mark it as Music, Ringtone, Alarm, or Notification.
Record a new audio clip to edit.
Delete audio (with confirmation alert).
Assign a Ringtone directly to a contact, you can also re-assign or delete the Ringtone from contact.
Sort by Tracks, Albums, Artists.
Manage contact Ringtone.

File formats
Supported file formats right now include:
FLAC
MP3
AAC/MP4 (including unprotected iTunes music)
WAV
3GPP/AMR (this is the format used when you record sounds directly on the handset)
OGG

Tips:
Tap anywhere on the waveform to start playing at that position.
While playing, tap the word Start or End to quickly set the start and end markers to the current playback time.
Use the jog wheel for more precise adjustments.
Press copy menu while editing files, then you can paste it to current file, or any other files of same type.
Music in clipboard will be paste to adjacency of end markers.
If bitrate is not match, you can also paste together, but the new waveform looks weird. That’s doesn’t affect the sound quality of new music file.

Ringtone save path:
Ringtone: sdcard/ringtones
Notification: sdcard/notifications
Alarm: sdcard/alarms
Music: sdcard/music

Frequently Asked Questions:
http://ringtone-maker.appspot.com/FAQ.html

Ringdroid and RingsExtended source code:
http://code.google.com/p/ringdroid/
http://code.google.com/p/apps-for-android/

Apache License, Version 2.0
http://www.apache.org/licenses/LICENSE-2.0.html

https://github.com/hefuyicoder/ListenerMusicPlayer
MIT License