I made test schem for TDA7056, but it do not work.
Simulation results:
Circuit: gooduntitled``Doing analysis at TEMP = 27.000000 and TNOM = 27.000000``Warning: vsignal: no DC value, transient time 0 value used
Warning: singular matrix: check nodes r2_1 and r2_1``Note: Starting dynamic gmin stepping
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Warning: singular matrix: check nodes r2_1 and r2_1``Warning: Dynamic gmin stepping failed
Note: Starting source stepping
Warning: singular matrix: check nodes r2_1 and r2_1``Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful gmin step
Note: One successful source step
Warning: singular matrix: check nodes r2_1 and r2_1``Warning: singular matrix: check nodes r2_1 and r2_1``Warning: source stepping failed``Transient solution failed -``Last Node Voltages
------------------``Node Last Voltage Previous Iter
---- ------------ -------------
vsignal_1 0 0
vcontrol_1 0 0
v1_1 0 0
r2_1 0 0
r2_2 0 0
volprobe 0 0
v1#branch 0 0
vcontrol#branch 0 0
vsignal#branch 0 0``doAnalyses: iteration limit reached``tran simulation(s) aborted
Error(parse.c--checkvalid): volprobe: no such vector.
ngspice-26 done
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Probably, the symbol you have chosen for the tda7056 has no spice model associated with it so your simulation will not run.
To understand how to run successful simulations in EasyEDA, please read - and play with copies of the simulations in- the Simulation Tutorial:
https://docs.easyeda.com/en/Simulation/Chapter1-Introduction/index.html