  We demonstrate control over attosecond pulse generation and shaping by
numerically optimizing the synthesis of few-cycle to sub-cycle driver
waveforms. The optical waveform synthesis takes place in an ultrabroad spectral
band covering the ultraviolet-infrared domain. These optimized driver waves are
used for ultrashort single and double attosecond pulse production (with tunable
separation) revealing the potentials of the light wave synthesizer device
demonstrated by Wirth et al. [Science 334, 195 (2011)]. The results are also
analyzed with respect to attosecond pulse propagation phenomena.
