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I'm curious if anyone has added DCC sound decoder to their Kato Shinkansen, specifically the E7 or N700A. I saw a thread on here from back in 2015 that started addressing this but it seemed to end very anticlimactically due to limitations at the time. It seems like the non-motored trailer cars for the N700A have a cavern under the floor piece with a metal weight. Since the metal strips already run through here it seems like an easy place to stash a sound decoder with a sugar cube speaker. I assume a decoder and speaker will come close to weight to the metal already there. I think the biggest question here though, has anyone ever generated sound files for any of the Shinkansen?

http://ajw.asahi.com/article/behind_news/social_affairs/AJ201409180073 *not mentioned here, but mentioned in the original Japanese print article, the actual main purpose of the speed-up is not to reduce the total travel time (though that is the general public advertising point) , but rather to facilitate faster timetable recovery in instances of accidents, bad weather, etc. Back in JNR days, the average delay in shinkansen services (in one year) typically ranged over two minutes, while this past decade, this has been reduced to under a minute- in the case of 2003, six seconds. However, last year, the average delay figure rose to 54 seconds. Presumably this technical development will help get that number back down again.