speex无法播放，智能在录制的时候播放音乐，我要上传到公众号当素材用。

直接改后缀名根本行不通，系统php禁用了exec()命令执行，怎么办？

HTTP/1.1 200 OK

Connection: close

Content-Type: voice/speex

Content-disposition: attachment; filename="MEDIA_ID.speex"

Date: Sun, 06 Jan 2016 10:20:18 GMT

Cache-Control: no-cache, must-revalidate

Content-Length: 339721

curl -G "https://api.weixin.qq.com/cgi-bin/media/get/jssdk?access_token=ACCESS_TOKEN&media_id=MEDIA_ID"