I don’t think I have a 1/4" to 1/8" cable to test this on hand…
I tested under sub-optimal circumstances (using TRS adapters on regular eurorack cables), and the answer is “basically yes” for my purposes. It’s not quite as loud as a raw oscillator, but it’s basically at the same level I’m attenuating my other voices to at the mixing stage anyway. It’s definitely workable without buying an intermediary module.