Asterisk 11 failed to play any sound in my Background

I tried to play on music in my Background but I it didn’t locate /var/lib/asterisk/sounds/Fernanda.gsm

Plese see my extensions.conf

[globals] ;Define as variáveis Globais
TELEFONISTA=SIP/3020 ;Declaração de variável

[general] ;Opções gerais do Dialplan
writeprotect=no ;Modo somente leitura
static=yes ;Modo estático

[ramais]
exten => _XXXX,1,Dial(SIP/${EXTEN},60,tT)

[fixo]
;fixo­local
exten => _[2­5]XXXXXXX,1,Dial(DAHDI/g0/${EXTEN},60)
;fixo­DDD
exten => _0ZZZZ[2­5]XXXXXXX,1,Dial(DAHDI/g0/${EXTEN},60)

[celular]
;Celular Local 
exten => _9[5­9]XXXXXXX,1,Dial(DAHDI/g0/${EXTEN},60)
;Celulares DDD 
exten => 0ZZ[1 9]X9XXXXXXXX,1,Dial(DAHDI/g0/${EXTEN},60)

[URA]

exten => s,1,Answer()
exten => s,n,Background(/var/lib/asterisk/sounds/Fernanda.gsm)
exten => s,n,WaitExten(1)
exten => s,n,Dial(${TELEFONISTA},20,tT)

CLI returns

asterisk*CLI> 
    -- Starting simple switch on 'DAHDI/1-1'
    -- Executing [s@URA:1] Answer("DAHDI/1-1", "") in new stack
    -- Executing [s@URA:2] BackGround("DAHDI/1-1", "/var/lib/asterisk/sounds/Fernanda.gsm") in new stack
[May 21 14:17:50] WARNING[9301][C-0000000c]: file.c:701 ast_openstream_full: File /var/lib/asterisk/sounds/Fernanda.gsm does not exist in any format
[May 21 14:17:50] WARNING[9301][C-0000000c]: file.c:1017 ast_streamfile: Unable to open /var/lib/asterisk/sounds/Fernanda.gsm (format (ulaw)): No such file or directory
[May 21 14:17:50] WARNING[9301][C-0000000c]: pbx.c:11477 pbx_builtin_background: ast_streamfile failed on DAHDI/1-1 for /var/lib/asterisk/sounds/Fernanda.gsm
    -- Executing [s@URA:3] WaitExten("DAHDI/1-1", "1") in new stack
    -- Timeout on DAHDI/1-1, continuing...
    -- Executing [s@URA:4] Dial("DAHDI/1-1", "SIP/3020,20,tT") in new stack
  == Using SIP RTP CoS mark 5
    -- Called SIP/3020
    -- SIP/3020-0000000b is ringing
    -- Nobody picked up in 20000 ms
    -- Auto fallthrough, channel 'DAHDI/1-1' status is 'NOANSWER'
    -- Hanging up on 'DAHDI/1-1'
    -- Hungup 'DAHDI/1-1'

Remove the extension of the file just leave it as Fernanda

Hi

I just remove, but it still continue

-- Starting simple switch on 'DAHDI/1-1'
    -- Executing [s@URA:1] Answer("DAHDI/1-1", "") in new stack
    -- Executing [s@URA:2] BackGround("DAHDI/1-1", "/var/lib/asterisk/sounds/Fernanda") in new stack
[May 21 15:04:26] WARNING[9319][C-00000011]: format_wav.c:112 check_header_fmt: Unexpected frequency mismatch 16000 (expecting 8000)
[May 21 15:04:26] WARNING[9319][C-00000011]: file.c:399 fn_wrapper: Unable to open format wav
[May 21 15:04:26] WARNING[9319][C-00000011]: file.c:1017 ast_streamfile: Unable to open /var/lib/asterisk/sounds/Fernanda (format (ulaw)): No such file or directory
[May 21 15:04:26] WARNING[9319][C-00000011]: pbx.c:11477 pbx_builtin_background: ast_streamfile failed on DAHDI/1-1 for /var/lib/asterisk/sounds/Fernanda
    -- Executing [s@URA:3] WaitExten("DAHDI/1-1", "1") in new stack
    -- Timeout on DAHDI/1-1, continuing...
    -- Executing [s@URA:4] Dial("DAHDI/1-1", "SIP/3020,20,tT") in new stack
  == Using SIP RTP CoS mark 5
    -- Called SIP/3020
    -- SIP/3020-00000011 is ringing
  == Spawn extension (URA, s, 4) exited non-zero on 'DAHDI/1-1'
    -- Hanging up on 'DAHDI/1-1'
    -- Hungup 'DAHDI/1-1'

Now it is complaining about the audio format. Try converting again with a valid frequency.

Ok, thanks very much.