BOOST_CHECK_EQUAL(e0.length, 1);
BOOST_CHECK_EQUAL(e0.data_length, AnalogSnapshot::EnvelopeDataUnit);
BOOST_REQUIRE(e0.samples != NULL);
BOOST_CHECK_EQUAL(e0.length, 1);
BOOST_CHECK_EQUAL(e0.data_length, AnalogSnapshot::EnvelopeDataUnit);
BOOST_REQUIRE(e0.samples != NULL);