Cannot play the file using Playback

Hi All,

I am trying to play a file in the macro using the playback, It does’t play.
I am using this code.

[macro-xyz]
exten => s,1,Playback(/var/lib/asterisk/sounds/business-greetings)
exten => s,2,Playback(/var/lib/asterisk/sounds/service-restrictions)
exten => s,3,Playback(/var/lib/asterisk/sounds/cost-of-call)

I am getting the following error.

-- Executing [s@macro-xyz:1] Playback("SIP/1234567899-0901c8c8", "/var/lib/asterisk/sounds/business-greetings") in new stack

[Jul 16 10:18:14] WARNING[3855]: format_wav.c:201 check_header: Unknown block - not fact or data
[Jul 16 10:18:14] WARNING[3855]: file.c:316 fn_wrapper: Unable to open format wav
[Jul 16 10:18:14] WARNING[3855]: file.c:813 ast_streamfile: Unable to open /var/lib/asterisk/sounds/business-greetings (format 0x2 (gsm)): No such file or directory
[Jul 16 10:18:14] WARNING[3855]: app_playback.c:437 playback_exec: ast_streamfile failed on SIP/1234567899-0901c8c8 for /var/lib/asterisk/sounds/business-greetings
– Executing [s@macro-xyz:2] Playback(“SIP/1234567899-0901c8c8”, “/var/lib/asterisk/sounds/service-restrictions”) in new stack
[Jul 16 10:18:14] WARNING[3855]: format_wav.c:201 check_header: Unknown block - not fact or data
[Jul 16 10:18:14] WARNING[3855]: file.c:316 fn_wrapper: Unable to open format wav
[Jul 16 10:18:14] WARNING[3855]: file.c:813 ast_streamfile: Unable to open /var/lib/asterisk/sounds/service-restrictions (format 0x2 (gsm)): No such file or directory
[Jul 16 10:18:14] WARNING[3855]: app_playback.c:437 playback_exec: ast_streamfile failed on SIP/1234567899-0901c8c8 for /var/lib/asterisk/sounds/service-restrictions
– Executing [s@macro-xyz:3] Playback(“SIP/1234567899-0901c8c8”, “/var/lib/asterisk/sounds/cost-of-call”) in new stack
– <SIP/1234567899-0901c8c8> Playing ‘/var/lib/asterisk/sounds/cost-of-call’ (language ‘en’)

can any one help me, where I am going wrong, and how should I approach to fix it.

Any help is highly appreciated.

Thanks & Regards,
Ajay1.

What are the files encoded in wav or gsm?