Fast Vibroplex by Camilo Jimenez of Tingambato, Michoacán, Mexico.

[@althepal6818]

35 wpm? In spanish I believe. Oscillator is chirping like the old days...

[@captbart3185]

Could well be Spanish or maybe Portuguese. I have trouble telling them apart. This is a tad fast for me. Right now 30WPM is about my top speed for solid copy.

[@jimewing5097]

This sounds to me like about 25 wpm with the dots set to about 35 wpm. A common bug sending problem, dots set too fast for actual speed.

[@djringjr]

Usually the dashes are sent too slowly as that's difficult to do at high speeds.