c++ - espeak_Initialize error messages with AUDIO_OUTPUT_SYNCH_PLAYBACK but not with AUDIO_OUTPUT_PLAYBACK -


i'm making c++ program using espeak_lib , don't know why when initialize with

espeak_initialize(audio_output_synch_playback,0,nullptr,espeakinitialize_phoneme_events);

i got next error lines

alsa lib pcm.c:2266:(snd_pcm_open_noupdate) unknown pcm cards.pcm.rear

alsa lib pcm.c:2266:(snd_pcm_open_noupdate) unknown pcm cards.pcm.center_lfe

alsa lib pcm.c:2266:(snd_pcm_open_noupdate) unknown pcm cards.pcm.side

alsa lib pcm_route.c:867:(find_matching_chmap) found no matching channel map

cannot connect server socket err = no such file or directory

cannot connect server request channel

jack server not running or cannot started

jackshmreadwriteptr::~jackshmreadwriteptr - init not done 4294967295, skipping unlock

jackshmreadwriteptr::~jackshmreadwriteptr - init not done 4294967295, skipping unlock

but if initilize code with

espeak_initialize(audio_output_playback,0,nullptr,espeakinitialize_phoneme_events);

it not give me error lines. problem here have reasons want code synchronous.

i don't want install jack since last time tried solve jack sound got messed , needed reinstall whole operative system solve , i'm sure there must way since work other audio_output_playback parameter

i'm using ubuntu-mate


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