How could I AM modulation from sound

Hello now I'm studying about AM/FM modulation & Demodulation
I wanna modulation sound whatever voice or soundfile to modulated signal
and demodulation form that to excutable sound signal like original sound
in the follow screenshot is simple am modulation
this block diagram mean as you know : (Carrier * signal)+carrier  = DSB-tc
problem is "Simulate Signal.vi" harm original signal to nomal sine signal
so i connected directly from input to multifly but that make error "Waveforms have different dt values"
at this point of time I wondering how could i multifly or add original signal with carrier
that was main problem
in addition If you can reply about how cound demodulate from modulated sinal to sound
and How could I play sound without delay in 'Acquire Sound.vi' I will be really appreciate 
Thank you in advance for your help
Attachments:
am_modulation 3.vi ‏2093 KB

reposted

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