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Thread 2 (LWP 16515):
#0  0xb73dede4 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
No symbol table info available.
#1  0xb758076e in clone () from /lib/i386-linux-gnu/libc.so.6
No symbol table info available.
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Thread 1 (Thread 0xb73d6700 (LWP 16511)):
#0  0xb777afa0 in ?? ()
No symbol table info available.
#1  0xb767484c in sox_find_format () from /usr/lib/libsox.so.1
No symbol table info available.
#2  0xb767490e in sox_write_handler () from /usr/lib/libsox.so.1
No symbol table info available.
#3  0xb7674af0 in ?? () from /usr/lib/libsox.so.1
No symbol table info available.
#4  0xb7675a8d in sox_open_write () from /usr/lib/libsox.so.1
No symbol table info available.
#5  0xb77b4e9b in ?? ()
No symbol table info available.
#6  0xb77b6629 in ?? ()
No symbol table info available.
#7  0xb77b67a5 in ?? ()
No symbol table info available.
#8  0xb77b68c1 in ?? ()
No symbol table info available.
#9  0xb77b7abb in ?? ()
No symbol table info available.
#10 0xb77b2941 in main ()
No symbol table info available.